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ASTM B556-90(2018)
Standard Guide for Measurement of Thin Chromium Coatings by Spot TestMore info
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.
| Author | ASTM |
|---|---|
| Editor | ASTM |
| Document type | Standard |
| Format | File |
| Confirmation date | 2018-08-01 |
| ICS | 25.220.40 : Metallic coatings |
| Number of pages | 3 |
| Replace | ASTM B556-90(2013) |
| Set | ASTMVOL0205 |
| Year | 1990 |
| Document history | ASTM B556-90(2013) |
| Country | USA |
| Keyword | ASTM 556;ASTM B556;ASTM B556;10.1520/B0556-90R18 |