Standard Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method1
This wellknown is issued below the ﬁxed designation b 504; the quantity at once following the designation indicates the year of authentic adoption or, inside the case of revision, the year of ultimate revision. Quite a number in parentheses suggests the year of last reapproval. A superscript epsilon (e) shows an article alternate since the final revision or reapproval.
This preferred has been approved to be used through groups of the department of defense.
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You can also get ASTM B 502 – 02 International standard