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These products consist of a steel substrate onto which a coating of pure zinc is applied by electrolysis, on one or both surfaces, from an aqueous solution of zinc salts. The presence of the zinc coating is intended to protect steel from corrosion, and compared to the hot dip process, electroplating allows for lower zinc thicknesses, therefore more suitable for interior applications or painting.
The thickness of the coating is extremely regular, and the surface, being uniform and manicured,makes an excellent substrate for paint.
Unlike the hot-dipping process, electroplating also allows only one of the two faces to be coated; therefore serveral combinations are possible:
ZE25/0
ZE50/0
ZE75/0
ZE100/0
for which it is necessary to specify whether you want the electro-galvanized face to be the top or the bottom. An additional type of electrolytic coating is that referred to as ZN, an alloy of zinc and nickel (11%) that optimizes corrosion resistance, formability, and unsolderability.
Electro-galvanized products can be supplied with special requirements for appearance and surface protection. The surface appearance can be either type A or B, unless otherwise requested at the time of order, the material is supplied with appearance A.
Coating name | Nominal galvanizing values on each face | Minimum galvanizing values on each face | ||
Thickness mm | Weight g/m2 | Thickness mm | Weight g/m2 | |
ZE25/25 | 2.5 | 18 | 1.7 | 12 |
ZE50/50 | 5.0 | 36 | 4.1 | 29 |
ZE75/75 | 7.5 | 54 | 6.6 | 47 |
ZE100/100 | 10.0 | 72 | 9.1 | 65 |
A | Minor imperfections such as small honeycombs, light scratching or slight staining are possible, which will not affect the suitability for forming and adherence of subsequently applied coatings |
B | The better of the two surfaces must be free from imperfections that would impair a quality paint job; the other face conforms to surface appearance A |
C | Chemical passivation, traditionally chromium-based; also available hexavalent chromium-free in accordance with RoHS Directive; not recommended for products that must be subsequently phosphated |
O | Oiling using oils that can be removed during greasing without compromising the coating |
CO | Combination of oiling and chemical passivation to enhance the protective effect against corrosion |
P | Phosphating, particularly suitable for the application of a subsequent layer of paint |
PO | Combination of phosphating and oiling to improve formability |
PC | Combination of phosphating and chemical passivation to enhance the protective effect against corrosion, while maintaining the material dry |
PCO | Combination of phosphating, chemical passivation and oiling to enhance the protective effect against corrosion |
U | Without any protection, under the customer’s responsibility |
Whatever the type of protection, it is very important that during transportation and storage, electro-galvanized materials avoid contact with moisture or water as much as possible and are kept in a dry environment.
These steels are available in different ranges of properties, from commercial (DC01) to deep drawing (DC04 and DC05) and high-strength grades (H340LA).
• Heating
• Telecommunications
• Cars
• Household appliances (refrigerators, washing machines, dishwashers, kitchen countertops, bathtubs, shower trays, water heaters, etc.)
Unlike the hot-dipping process, electroplating also allows only one of the two faces to be coated; therefore, ZE 25/0, ZE 50/0, ZE75/0, and ZE100/0 combinations are also possible, for which it is necessary to specify whether you want the electro-galvanized face to be the top or the bottom.
Electro-galvanized products can be supplied with special requirements for appearance and surface protection.
Commit Siderurgica SPA
Via dell’industria, 23
35030 Veggiano (PD)
VAT no. 01958150284
Commit Metalli SRL
Via volta, 69
35030 Veggiano (PD)
VAT no. 04678270283
