CEN EN ISO 4628-8 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect
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European Committee for Standardization
Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect
N EN ISO 4628-8
Annotation
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]
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