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ASTM International , 11/01/2016
Publisher: ASTM
File Format: PDF
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1.1These test methods cover accelerated determination of the resistance of porcelain enamel coatings on aluminum alloys to spalling from exposure to moisture or weathering. Test Method A,2 using a 5 % solution of ammonium chloride, requires 96-h immersion while Test Method B,3 using a 1 % solution of antimony trichloride, is completed after 20 h of immersion. The spalling tendency is evaluated by the same criteria in both methods. While either method is suitable for magnesium silicon alloys, such as 6061, Test Method B is preferred for simple alloys or commercially pure aluminum, such as 1100.
1.2The test methods appear in the following order:
Sections
Test Method A-Ammonium Chloride
4 - 9
Test Method B-Antimony Trichloride
10 - 15
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