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Letter 3092
Need advise on plating thickness
measurement
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Can you please let me know which is the most preferred method for
measuring plating thickness for Zinc-Iron electroplated over cold
rolled steel rivets. ASTM B 487 (Microscopic) or B 568 (X-Ray) or B
499 (Magnetic) or B 504 (Coulometric)?. What are the advantages and
disadvantages of above methods. I heard that the Iron in Iron-Zinc
platings renders it difficult to get repeatable readings using the
Magnetic method (like a Fisher plating thickness gage) is this true?.
Thanks in advance for your answers.
Ganesh Raj
automotive components - Wylie,
Texas
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