What is BS 6338 - Chromate conversion coatings on zinc and cadmium about?

Coatings of zinc and cadmium are chromate treated in order to retard the formation of corrosion

products on the surfaces of coatings exposed in corrosive atmospheres. Chromate treatment is particularly effective in retarding the formation of white corrosion products which form on zinc and cadmium coatings under certain conditions.

BS 6338 is an International Standard that specifies requirements relating to chromate conversion coatings on zinc and cadmium intended to give protection against corrosion. Finishes for giving particular colours only or specifically to improve paint adhesion are not covered by BS 6338.

Thicknesses of electroplated coatings suitable for chromate treatment are covered by the relevant International Standards, i.e. BS EN ISO 2081 and BS EN ISO 2082.

Who is BS 6338 - Chromate conversion coatings on zinc and cadmium for?

BS 6338 on chromate conversion coatings on zinc and cadmium is useful for:

Manufacturers of metallic coatings
Manufacturers of machines and equipment
Companies providing surface treatment solutions
Electroplating industry
Product design engineers
Mechanical and chemical engineers
Industries including but not limited to aerospace, food manufacturing, medical, military and defence

Why should you use BS 6338 - Chromate conversion coatings on zinc and cadmium?

Chromate conversion coating or alodine coating is a type of conversion coating used to passivate steel, aluminium, zinc, cadmium, copper, silver, titanium, magnesium, and tin alloys.

BS 6338 provides you with a method of application of chromate conversion coatings, classification, and requirements of the chromate conversion coatings to be applied on zinc and cadmium.

BS 6338 provides you guidance on chromate conversion coating which can be useful for to impart brightness and improving the corrosion resistance of bare metal and as a substrate to provide improved paint adherence on nonferrous surface.

By adopting BS 6338 best industry requirements, you can to protect electroplated zinc and cadmium coated components from corrosion and deteriorating.

BS 6338:1982

Specification for chromate conversion coatings on electroplated zinc and cadmium coatings

Current, Under Review

Published:

31 Dec 1982