BS EN ISO 14713-2:2009 Zinc coatings. Guidelines and recommendations for the protection against corrosion of iron and steel in structures. Hot dip galvanizing
BS EN ISO 14713-2 provides guidelines and recommendations regarding the general principles of design which are appropriate for articles to be hot dip galvanized for corrosion protection.
The protection afforded by the hot dip galvanized 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 hot dip galvanized article can be further protected by application of additional coatings (outside the scope of this part of ISO 14713), such as organic coatings (paints or powder coatings). When applied to hot dip galvanized articles, this combination of coatings is often known as a “duplex system”.
The guidelines and recommendations in BS EN ISO 14713-2 do not deal with the maintenance of corrosion protection in service for steel with hot dip galvanized coatings. Guidance on this subject can be found in ISO 12944-5.
Specific product-related requirements (e.g. for hot dip galvanized coatings on tubes or fasteners, etc.) will take precedence over these general recommendations.
Contents of BS EN ISO 14713-2:
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design for hot dip galvanizing
4.1 General
4.2 Surface preparation
4.3 Procedures related to design considerations
4.4 Design features
4.5 Tolerances
5 Design for storage and transport
6 Effect of article condition on quality of hot dip galvanizing
6.1 General
6.2 Surface condition
6.3 Influence of steel surface roughness on the hot dip galvanized coating thickness
6.4 Influence of thermal cutting processes
6.5 Effect of internal stresses in the basis steel
6.6 Large objects or thick steels
6.7 Hot dip galvanizing practice
7 Effect of hot dip galvanizing process on the article
7.1 Dimensional tolerances on mating thread
7.2 Effect of process heat
8 After-treatments
Annex A (informative) Preferred designs of articles for hot dip galvanizing
Bibliography