ASTM B556-90(2018) PDF

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 620 % (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.

ASTM B556-90(2018) Referenced Document

ASTM B504 Standard Test Method for Measurement of Thickness of Metallic Coatings by the Coulometric Method*， 2023-05-01 Update
ASTM B568 Standard Test Method for Measurement of Coating Thickness by X-Ray Spectrometry*， 2021-04-01 Update
ASTM B588 Standard Test Method for Measurement of Thickness of Transparent or Opaque Coatings by Double-Beam Interference Microscope Technique

2023 ASTM B556-90(2023) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
2018 ASTM B556-90(2018) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
1990 ASTM B556-90(2013) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
1990 ASTM B556-90(2012) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
1990 ASTM B556-90(2007) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
1990 ASTM B556-90(2002) Standard Guide for Measurement of Thin Chromium Coatings by Spot Test
1990 ASTM B556-90(1997) Standard Guide for Measurement of Thin Chromium Coatings by the Spot Test