ASTM-B244 › Historical Revision Information
Standard Test Method for Measurement of Thickness of Anodic Coatings on Aluminum and of Other Nonconductive Coatings on Nonmagnetic Basis Metals with Eddy-Current Instruments
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Scope
1.1 This test method covers the use of eddy-current instruments for the nondestructive measurement of the thickness of a nonconductive coating on a nonmagnetic basis metal.
1.2 This test method is particularly useful for measuring the thickness of an anodic coating on aluminum alloys. Chemical conversion coatings are too thin to be measured by this method.
Significance and Use
The thickness of a coating is often critical to its performance. This eddy-current method is nondestructive and is suitable for measuring the thickness of anodic coatings on aluminum, as well as the thickness of most nonconductive coatings on nonmagnetic basis metals.
This test method requires that the conductivity of the substrate be the same in the calibration standard and in the coated article to be measured.
Keywords
coatings; ICS Number Code 17.040.20 (Properties of surfaces)
To find similar documents by ASTM Volume:
02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)
To find similar documents by classification:
17.040.20 (Properties of surfaces)
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Document Number
ASTM-B244-97(2002)
Revision Level
1997 R02 EDITION
Status
Superseded
Publication Date
April 10, 1997
Document Type
Test Method
Page Count
3 pages
Committee Number
B08.10