ASTM D 4138 : 2007 : REV A : R2013
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-Sectioning Means
Hardcopy , PDF
11-11-2014
English
01-07-2013
CONTAINED IN VOL. 06.01, 2018 Describes the measurement of dry film thickness of coating films by microscopic observation of precision angular cuts in the coating film.
Committee |
D 01
|
DocumentType |
Standard Practice
|
Pages |
6
|
ProductNote |
Reconfirmed 2013
|
PublisherName |
American Society for Testing and Materials
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Status |
Superseded
|
SupersededBy | |
Supersedes |
1.1This practice describes the measurement of dry film thickness of coating films by microscopic observation of precision angular cuts in the coating film. Use of these procedures may require repair of the coating film. This practice is intended to supplement the manufacturers' instructions for the manual operation of the gages and is not intended to replace them. It includes definitions of key terms, reference documents, the significance and use of the practice, and the advantages and limitations of the instruments.
1.3These procedures are not applicable for soft or ductile substrates that may deform under the test gage cutting tip. The substrate should be sufficiently rigid to prevent deformation of the coating during the cutting process. The surface may be flat or moderately curved. Pipes as small as 25 mm (1 in.) in diameter may be measured in the axial direction.
1.4Individual coats in a multicoat system where there is a discernible visual difference between coats or the overall thickness of a coating system can be measured by these procedures.
1.5The range of thickness measurement is typically 2 to 2000 microns (0.1 to 80 mils) and depends upon the cutting angle of the blade.
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