Anodizing of aluminium and its alloys. Determination of electric breakdown potential
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1 Scope This International Standard specifies test methods for the determination of the electric breakdown potential of anodic oxidation coatings on aluminium and its alloys, on flat or near-flat surfaces and on round wire. The methods are applicable to anodic oxidation coatings used primarily as electrical insulators. The methods are not applicable to coatings in the vicinity of cut edges, the edges of holes, or sharp changes of angle on, for example, extruded shapes.
NOTE 1 The methods described do not give satisfactory results for unsealed coatings.
NOTE 2 Electric breakdown potential is affected by relative humidity.
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