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14 OK OK OK OK OK OK OK Surface treatment recommendations Hot Dip galvanized will on some parts be replaced by Zinc/Nickel (DIN 50979). Zinc/Nickel is electrolytically inorganic corrosion-resistant coatings that meet most requirements for extremely corrosive environment. Zn-Ni containing 12-15% nickel in the layer and provides good corrosion protection even in thin layers. Along with a polished or black passivation can be more than 720 h (according to ISO 9227, NSS) to the base metal corrosion is achieved. Zinc/Nickel can be used together with aluminium. Zinc/Nickel Zinc Plated Hot Dip Galvanized* Stainless 304L Stainless/Acid Proof 316L *) Zinc/Nickel (SS-EN ISO 11997-1, DIN 50979) on some parts Food Infra- Telecom/ industry Off shore structure Energy data Machine Optimal Possible Not recommended C 1 Indoor heated areas. Outdoor artic or desserts. C 2 Indoor unheated areas. Outdoor dry areas with low degree of contimation. C 3 Indoor in humid production areas with low degree of contimation. Costal areas with low desposition of salt. Mildly contimated urban and industrial areas. C 4 Chemical plants, indoor swimming pools. Pol- luted urban and industrial areas. Costal areas with low desposition of salt. C 5 Industrial with high degree of pollution and high humidity. Costal and offshore areas with high desposition of salt. 0 None 1 Electroplated to a minimum of 5 μm 2 Electroplated to a minimum of 12 μm 3 Pregalvanised to grade 275 according to EN 10327 and EN 10326 4 Pregalvanised to grade 350 according to EN 10327 and EN 10326 5 Post-galvanised to a zinc mean coating thickness (minimum) of 45 μm according to ISO 1461 for zinc thickness only 6 Post-galvanised to a zinc mean coating thickness (minimum) of 55 μm according to ISO 1461 for zinc thickness only 7 Post-galvanised to a zinc mean coating thickness (minimum) of 70 μm according to ISO 1461 for zinc thickness only 8 Post-galvanised to a zinc mean coating thickness (minimum) of 85 μm according to ISO 1461 for zinc thickness only (high silicon steel) 9A Stainless steel manufactured to ASTM: A240/A-95A designation S30400 or EN 10088 grade 1-4301 without post treatment 9B Stainless steel manufactured to ASTM: A240/A-95A designation S31603 or EN 10088 grade 1-4404 without post treatment 9C Stainless steel manufactured to ASTM: A240/A-95A designation S30400 or EN 10088 grade 1-4301 without post treatment 9D Stainless steel manufactured to ASTM: A240/A-95A designation S31603 or EN 10088 grade 1-4301 without post treatment Zinc plated Black zinc * Hot dipped Zn/Ni Hot dipped Trays 304L 316L * Only by order ISO - Environmental conditions IEC - Reference, material and finish X-Tray ®