This International Standard outlines general methods for determining the average surface density over a measured area of anodic oxide or of a coating deposited autocatalytically, mechanically, by chemical conversion, by electrodeposition, by hot dip galvanizing and by vacuum using gravimetric and other chemical analysis procedures that have attained some degree of national or international standardization.
A variety of procedures are described and include:
- gravimetric procedures for chemical or electrochemical dissolution of the coating or the substrate to determine the coating surface density;
- analytical procedures that utilize dissolution of the coating for photometric or volumetric determination of the coating surface density;
- non-destructive instrumental physical analysis of the coating to determine the surface density.
With the exception of the gravimetric method described in ISO 3892:-, this International Standard does not give the measurement uncertainties of the methods cited.