Mesh tray light

SS-MTL60

Mesh tray light

Name: Trayco
Address: Bedrijvenpark Coupure 5A, Oudenaarde, Oost-Vlaanderen, 9700, Belgium
Telephone: +32 (0)55 23 29 90

SS-MTL60

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Technical Data Sheet

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Technical info Assembly Load diagram Accessories and options

	SKU	Article code	Finishing	Dimension A	Usable surface (cm²)	Packaging
	14390	MTL60-050-3SS304	SS304	50	16.54	3	Default
EAN 5415129042681 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4301) AISI 304 Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14391	MTL60-100-3SS304	SS304	100	43.67	3	Default
EAN 5415129042698 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4301) AISI 304 Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14392	MTL60-150-3SS304	SS304	150	70.79	3	Default
EAN 5415129042704 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4301) AISI 304 Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14393	MTL60-200-3SS304	SS304	200	97.92	3	Default
EAN 5415129042711 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4301) AISI 304 Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14394	MTL60-300-3SS304	SS304	300	152.17	3	Default
EAN 5415129042728 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4301) AISI 304 Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	15953	MTL60-400-3SS304	SS304	400	206.42	3	Default
EAN 5415129057883 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4301) AISI 304 Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14145	MTL60-050-3SS316	SS316	50	16.54	3	Default
EAN 5415129040410 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4404) AISI 316L Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14150	MTL60-100-3SS316	SS316	100	43.67	3	Default
EAN 5415129040465 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4404) AISI 316L Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14155	MTL60-150-3SS316	SS316	150	70.79	3	Default
EAN 5415129040519 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4404) AISI 316L Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14160	MTL60-200-3SS316	SS316	200	97.92	3	Default
EAN 5415129040564 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4404) AISI 316L Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.
	14165	MTL60-300-3SS316	SS316	300	152.17	3	Default
EAN 5415129040618 Assembly Workload Norm IEC61537 Safe workload - Max. torque - Load graph Additional information Product features Connect with BN06-10 / ROD08 Equipotential connection - EC declaration of conformity We declare that our products are in conformity with: - the rules of the essential requirements of the EC directive: 2014/35/EU (low voltage) - the applicable national standards and technical specifications: CEI IEC 61537 Technical documentation is available at the manufacturer location. (On condition that the products are used in the manner intended and/or in accordance with the current installation standards and/or with the recommendations of the manufacturer.) Finishing Stainless steel (1.4404) AISI 316L Adding chrome(±13%) to the iron creates a certain sheen and the metal becomes more corrosion-resistant. The advantage, compared to other protective coatings, is that it’s not a one-oﬀ surface protection. In fact, the stainless steel (or rather the chrome) forms a thin, invisible layer of chromium oxide whenever it comes into contact with oxygen: the oxide film. This thin layer protects the underlying stainless steel from further corrosion (oxidation). If the oxide flm suﬀers damage, then the underlying stainless steel will be re-exposed to the oxygen in the air and the protective coat will re-form. In this way, it repairs itself whenever it gets damaged. In certain circumstances or if the protective oxide flm is damaged, the corrosion can be locally quite rapid. This is caused, among other things, by chlorides or other materials (usually iron) that lodge in the surface. Due to this contamination, pitting corrosion may occur that corrodes the stainless steel (SS). That’s why, after the processing, the SS is treated, to remove all possible impurities. This is the `pickling’ stage. As mentioned above, a passive chromium layer protects the steel and repairs itself automatically. There are, however, circumstances in which this repair does not happen. Certain process steps may disrupt the balance in such a way that the passive state disappears and an active layer is formed. This could occur during process steps such as welding, bending or machining (with removal of metal or wood), giving rise to oxygen-poor pockets and the repair fails to materialise. Consequently, the rustproof properties are lost and, if exposed to gases or liquids, corrosion will occur. To remedy this situation, the active layer is re-converted to a passive layer (this process is known as passivating). In is usually desirable to degrease the semi-fnished products and, after that, to pickle them in a mixture of nitric acid (HNO3) and hydrogen ﬂuoride (HF), in order to remove impurities from the metal surface. This may be necessary on welded surfaces or on rotated objects for which a coolant is used.