【国外标准】 Standard Test Method for Nickel on Steel for Porcelain Enameling by Photometric Analysis (Withdrawn 2021)

3.1 This test method is primarily used to control the nickel dipping operation to ensure that the desired level of nickel deposition is attained. It is also used to prepare test plates used for calibration in Test Method C810.1.1 This test method covers the determination of the amount of nickel deposited on sheet steel during its preparation for porcelain enameling. It is a photometric method commonly used on production parts and is suitable for determining the heavier nickel deposits that may be obtained during the processing of steel for one-coat enameling.NOTE 1: An alternative X-ray emission spectrometry method is Test Method C810.1.2 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.