ASTM International - ASTM B556-90(2018)

Standard Guide for Measurement of Thin Chromium Coatings by Spot Test

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Organization: ASTM International
Publication Date: 1 August 2018
Status: active
Page Count: 3
ICS Code (Metallic coatings): 25.220.40
significance And Use:

4.1 The thickness of a decorative chromium coating is often critical to its performance.

4.2 This procedure is useful for an approximate determination when the best possible accuracy is not... View More

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 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

ASTM B556-90(2018)
August 1, 2018
Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
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...
December 1, 2013
Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
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...
May 1, 2012
Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
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...
March 1, 2007
Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
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...
February 23, 1990
Standard Guide for Measurement of Thin Chromium Coatings by the Spot Test
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...
February 23, 1990
Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
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...
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