GSO ISO 4628-8:2014

ISO 4628-8:2012

Gulf Standard Current Edition · Approved on 25 December 2014

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

GSO ISO 4628-8:2014 Files

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GSO ISO 4628-8:2014 Scope

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]