Electro-galvanised

Steel coated with zinc via electrolysis or electro-galvanised EN10152:2009

AREAS OF IMPLEMENTATION

  • Telecommunications
  • Automotive
  • Household appliances (refrigerators, washing machines, dishwashers, kitchen, bath tubs, showers, water heaters, etc …)

Characteristics

These products consist of a steel substrate on which a coating of pure zinc is applied by electrolysis, on one or both surfaces, starting from an aqueous solution of zinc salts. The presence of the zinc coating is intended to protect the steel from corrosion, but, compared to the process of hot dipping, electroplating allows for a lower thickness of zinc, therefore it is more suitable for indoor applications or for painting. The thickness of the coating is extremely smooth and the surface, being uniform, constitutes an excellent substrate for paint.

Coating
Name

Nominal values of zinc on each side

Nominal values of zinc on each side

Thickness

mm

Mass

g/m2

Thickness

mm

Mass

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

Unlike the process of hot dipping, electroplating allows for the coating of only one of the two faces; therefore combinations are possible:


ZE25/0
ZE50/0
ZE75/0
ZE100/0

It is necessary to specify if you want either the upper or lower surface to be electro-galvanized.

A further type of electrolytic coating is the one indicated as ZN, an alloy of zinc and nickel (11%) that optimizes corrosion resistance, formability and weldability.

Electro-galvanised products can be supplied with particular requirements in appearance and surface protection.

The surface appearance can be either A or B, unless otherwise requested at the time of the order, the material comes with surface A.


SURFACE APPEARANCE

A

Some small imperfections are possible such as small pits, variations in the size of the spangle, dark spots, light scratches and passivation marks

B

It is obtained by skin-passing. With this type of surface imperfections such as scratches are possible due to the passing process, streaks, irregularities but not cavities

There are various types of surface protection and must be properly indicated in the order:

SURFACE PROTECTION

C

Chemical passivation, traditionally chromium based; also available free of hexavalent chromium in accordance with the RoHS Directive; yellowish residue may be found on the surface but it does not alter the product characteristics

O

Oiled using oils that can be removed during greasing without compromising the coating

CO

Combination of oiling and chemical passivation to improve protection against corrosion

P

Phosphation, particularly suitable for the application of a subsequent layer of paint

PO

Combination of phosphation and oiling to improve formability

PC

Combinazione di fosfatazione e passivazione chimica per migliorare l’effetto protettivo contro la corrosione mantenendo secco il materiale

PCO

Combinazione di fosfatazione, passivazione chimica e oliatura per massimizzare l’effetto protettivo contro la corrosione

U

Without any protection, under the full responsibility of the customer

Whatever form of surface protection is implemented it is very important that, during transport and storage, galvanized materials avoid, as much as possible, contact with moisture or water and are kept in a dry environment.

These steels are available with a wide range of characteristics, from commercial quality (DC01) to those for deep drawing (DC04 and DC05) and high strength (H340LA).