ISO 4628-3-2016 pdf free.Paints and varnishes – Evaluation of degradation of coatings一Designation of quantity and size of defects, and of intensity of uniform changes in appearance – Part 3: Assessment of degree of rusting. This part of Iso 4628 specifies a method for assessing the degree of rusting of coatings by comparison with pictorial standards. The pictorial standards provided in this part of Iso 4628 show coated steel surfaces which have deteriorated to different degrees by a combination of rust broken through the coating and visible underrust. NOTE 1 The pictorial standards have been selected from the European rust scale published by the European Confederation of Paint, Printing Ink and Artists’ Colours Manufacturers’ Associations (CEPE), Brussels. The correlation between the ISO scale and the “European rust scale is given in Annex B. Table B.1. NOTE 2 The correlation between the ISO scale and the rating system of ASTM D 610 is given in Annex B. Table 8.2. NOTE 3 The rust formation on uncoated steel surfaces is designated in accordance with ISO 850 1-1 (rust grades A, B, C. and D). ISO 4628-1 defines the system used for designating the quantity and size of defects and the intensity of changes…