NF EN ISO 4628-3, T30-140-3 (11/2024)

This part of ISO 4628 specifies a method for evaluating the degree of rusting of coatings by comparison with illustrated standards. The pictorial standards provided in this part of ISO 4628 show coated steel surfaces deteriorated to varying degrees by the combination of rust penetrating the coating and apparent underlying rust. NOTE 1 The standards illustrated are chosen from the “European rust degree scale” published by the European Confederation of Associations of Manufacturers of Paints, Printing Inks and Art Colors (CEPE), in Brussels. The correspondence between the ISO scale and the “European rust degree scale” is shown in Annex B, Table B.1. NOTE 2 The correspondence between the ISO scale and the ASTM D 610 rating system is given in Annex B, Table B.2. NOTE 3 Rust formation on uncoated steel surfaces is designated in accordance with ISO 8501-1 (rust grades A, B, C and D). ISO 4628-1 defines a system for designating the quantity and size of defects, as well as the intensity of changes in appearance occurring on coatings, and sets out the general principles of this system. This system is intended to be used, in particular, for defects caused by aging and weathering, as well as for uniform changes such as color changes, e.g. yellowing.
(Automatic translation from French)