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Electrogalvanized sheet coated on one or both sides

Applications

Due to their high corrosion resistance, electrogalvanized products are recommended for numerous applications in the automotive industry.

Electrogalvanized products, in both single and double sided versions, are particularly well suited for visible parts.

 

Technical characteristics

The dimensional feasibility of electrogalvanized coatings depends on the choice of steel substrate (see corresponding technical sheets) and on the manufacturing route involved.

Surface appearance
The surface quality obtained meets the most stringent requirements with regard to final painted appearance of external body components.

Hardness
The electrogalvanized coating consists of pure zinc and is therefore ductile, enabling it to withstand large deformations.
Suitable surface preparation prior to electrogalvanizing ensures coating adhesion.

Morphology

Cross section of a 7.5 x 7.5 µm

electrogalvanized coating (x 1000)

Surface appearance of an

electrogalvanized coating (x 2000)

Coating thickness
Unless otherwise specified, the standard coating thicknesses offered are 5 and 7.5 µm per side; However, other thicknesses may be considered. Please consult us.

Coating process

The electrogalvanized coating is obtained by electrolytically depositing a layer of pure zinc. The absence of heating during the coating process enables electrogalvanized coatings to be employed without restriction on virtually all the steel grades developed by ArcelorMittal for the automotive industry.

The electrolytic process makes it possible to achieve a very high purity coating.

Recommendations for use and secondary processing

Corrosion
Electrogalvanized coatings offer excellent corrosion protection, even when damaged (impact, scratches, gravel impingement), due to the sacrificial electrochemical behaviour of zinc with respect to iron.

Drawing
Electrogalvanized coatings have excellent intrinsic formability, making them suitable for the most severe drawing operations.

The tribological behavior of electrogalvanized coatings is slightly inferior to that of hot dip coatings, and for the most difficult parts can justify the use of an appropriate chemical surface treatment.

ArcelorMittal has a range of in-line surface treatments. Please consult us if necessary.

 

Welding

Electrogalvanized steels have a wide resistance spot welding range suited to industrial requirements.

 

Adhesive bonding
Like all zinc coatings, electrogalvanized films show good adhesive bonding behavior, adhesion to the coating, adhesion of the coating to the metal and cohesion of the coating itself. The quality of bonding is determined essentially by the type of adhesive, the joining conditions, the nature of the protective oil and any chemical treatment that may have been performed.

Surface treatment
Electrogalvanized products coated on one or both sides can be phosphated and painted at the user's premises using all current processes.

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