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ASTM B556-90(2002)

Historical Reaffirmation

Standard Guide for Measurement of Thin Chromium Coatings by Spot Test

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1.1 This guide covers the use of the spot test for the measurement of thicknesses of electrodeposited chromium coatings over nickel and stainless steel with an accuracy of about ±20 % (Section 9). It is applicable to thicknesses up to 1.2 μm.

Note 1—Although this test can be used for coating thicknesses up to 1.2 μm, there is evidence that the results obtained by this method are high at thicknesses greater than 0.5 μm. In addition, for coating thicknesses above 0.5 μm, it is advisable to use a double drop of acid to prevent depletion of the test solution before completion of the test.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


SDO ASTM: ASTM International
Document Number B556
Publication Date Feb. 23, 1990
Language en - English
Page Count 3
Revision Level 90(2002)
Supercedes
Committee B08.10
Publish Date Document Id Type View
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Aug. 1, 2018 B0556-90R18 Reaffirmation
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May 1, 2012 B0556-90R12 Reaffirmation
March 1, 2007 B0556-90R07 Reaffirmation
Feb. 23, 1990 B0556-90R02 Reaffirmation
Feb. 23, 1990 B0556-90R97 Reaffirmation