BS EN ISO 14713-3:2009 Zinc coatings. Guidelines and recommendations for the protection against corrosion of iron and steel in structures. Sherardizing
BS EN ISO 14713-3 provides guidelines and recommendations regarding the general principles of design that are appropriate for articles to be sherardized for corrosion protection.
The protection afforded by the sherardized coating to the article will depend upon the method of application of the coating, the design of the article and the specific environment to which the article is exposed. The sherardized article can be further protected by application of additional coatings (outside the scope of this part of ISO 14713), such as organic coatings (wet paints or powder coatings). When applied to sherardized articles, this combination of coatings is often known as a “duplex system”.
The maintenance of corrosion protection in service for steel with sherardized coatings is outside the scope of this part of BS EN ISO 14713-3.
Specific product-related requirements (e.g. for sherardized coatings on fasteners or tubes, etc.) will take precedence over these general recommendations.
Contents of BS EN ISO 14713-3:
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Design for sherardizing
4.1 General
4.2 Surface preparation
4.3 Design considerations
4.4 Clearances of threaded components
5 Storage and transport
5.1 General
5.2 Recommendations for storage and transport
6 Effects of article condition on quality of sherardizing
6.1 Composition
6.2 Surface condition
6.3 Influence of steel surface roughness on the sherardized coating thickness
6.4 Internal stresses in the base material
6.5 Large objects and thick steels
7 Effect of sherardizing process on the article
7.1 Processing circumstances
7.2 Coating properties influenced by the sherardizing process
8 After-treatments
Bibliography