scope:

This International Standard specifies requirements for electroplated coatings of zinc with supplementary treatments on iron or steel. It includes information to be supplied by the purchaser to the electroplater, and the requirements for heat treatment before and after electroplating.
It does not apply to zinc coatings applied to sheet, strip or wire in the non-fabricated form; to close-coiled springs; or for other than protective or decorative purposes.
This International Standard does not specify requirements for the surface condition of the basis metal prior to electroplating with zinc. Because the appearance and serviceability of zinc coatings depends on the surface condition of the basis metal, agreement should be reached between the interested parties that the surface finish of the basis metal is satisfactory for electroplating [See 4.1c) and 4.1e)].
The coating thickness that can be applied to threaded components may be limited by dimensional
requirements, including class or fit. Attention is drawn to ISO 4042 (Ref. 1) which specifies the maximum thickness that can be applied to standard threads.