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1.1 This test method covers the determination of the ratio of corner thickness (see ) to face thickness (see 3.1.3) of powdered plastic coatings applied to a specific face thickness by dipping preheated square bars into aerated powder and curing the coating using predetermined conditions.
Note 1—The property of corner coverage has also been referred to as "edge coverage," though the latter is not recommended. There are widespread misunderstandings and expectations relative to the term "edge coverage." This test is performed on a steel bar having square corners and the results do not necessarily relate to edges that are sharper, that is, burrs. A coating that has measurable corner coverage may still not protect sharper edges from corrosion or provide the electrical insulation needed in some applications.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D374/D374M Test Methods for Thickness of Solid Electrical Insulation
ICS Number Code 29.035.99 (Other insulating materials)
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ASTM D2967-02a, Standard Test Method for Corner Coverage of Powder Coatings, ASTM International, West Conshohocken, PA, 2002, www.astm.orgBack to Top