BS EN ISO 4628-8:2012

This standard BS EN ISO 4628-8:2012 Paints and varnishes. Evaluation of degradation of coatings. Designation of quantity and size of defects, and of intensity of uniform changes in appearance is classified in these ICS categories:

• 87.040 Paints and varnishes

This part of ISO 4628 specifies a method for assessing delamination and corrosion around a scribe or other artificial defect on a coated panel or other coated test specimen, caused by a corrosive environment.

This part of ISO 4628 does not cover evaluation of pitting corrosion or pit depth.

NOTE 1 Examples of corrosive environments are artificial atmospheres such as salt spray, as used in the test method specified in ISO 9227,^[7] and sea water immersion as used in the test method specified in ISO 15711.^[8] Natural environments can also be used.

NOTE 2 The extent of other defects can also be determined at the same time as delamination and corrosion. Methods are given as follows:

• blistering in accordance with ISO 4628-2;^[2]

• rusting in accordance with ISO 4628-3;^[3]

• cracking in accordance with ISO 4628-4;^[4]

• flaking in accordance with ISO 4628-5;^[5]

• filiform corrosion in accordance with ISO 4628-10.^[6]