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ISO 4628-3:2016 pdf free

ISO 4628-3:2016 pdf free.Paints and varnishes – Evaluation of degradation of coatings
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 B.2.
NOTE 3 The rust formation on uncoated steel surfaces is designated in accordance with IS0 8501-1 (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 in appearance of coatings and outlines the general principles of the system. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour changes, for example yellowing.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4628-1:2016, Paints and varnishes一Evaluation of degradation of coatings一Designation of quantity and size of defects, and of intensity of uniform changes in appearance一Part 1: General introduction and designation system
ISO 13076, Paints and varnishes一Lighting and procedure for visual assessments of coatings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 degree of rusting  Ri
rating characterizing the degree of rust formation (rust broken through and visible underrust) on a coating.ISO 4628-3 pdf download.

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