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ASTM-B556 2012

ASTM-B556 2012

$35.75

B556-90(2012) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test

Published By Publication Date Number of Pages
ASTM 2012 3
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ASTM B556-90-Reapproved2012

Historical Standard: Standard Guide for Measurement of Thin Chromium Coatings by Spot Test

ASTM B556

Scope

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.2

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.3 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 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 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.

Keywords

ICS Code

ICS Number Code 25.220.40 (Metallic coatings)

DOI: 10.1520/B0556-90R12

ASTM-B556 2012
$35.75