ASTM B530 涂层厚度磁性测量的标准测试方法: Electrodeposited Nickel Coatings on Magnetic and non-magnetic Substrates includes non-destructive measurement of the thickness of electrodeposited nickel coatings on magnetic or non-magnetic substrates using a magnetic instrument.
意义及用途

5.1 涂层的厚度通常对其性能很重要. This magnetic method is suitable for non-destructive measurement of thickness and specification acceptance of certain nickel coatings.

5.2 The method requires that the magnetic properties of the coating and its substrate be the same as those of the reference standard used for instrument calibration adjustment.

5.3 The method should not be used to determine the thickness of self-catalyzed deposited nickel-phosphorus alloys containing more than 8% P in steel. As long as the measurements are made prior to any heat treatment, those coatings are sufficiently non-magnetic for test method B499 to be suitable for the determination.

B530-2014 “用磁力法测量涂层厚度的标准试验方法: 磁性和非磁性基材上的电沉积镍涂层”

步 1: 范围

1.1 This test method includes non-destructive measurement of the thickness of an electrodeposited nickel coating on a magnetic or non-magnetic substrate using a magnetic instrument. 它旨在补充制造商有关仪器操作的说明, 不去取代他们.

1.2 These instruments measure the magnetic attraction between the magnet and the coating – substrate combination (分类为 “magnetic pull-off”), or the change in magnetic flux density within the probe (分类为 “电子”).

1.3 For this test method, two types of coating-substrate combinations can be encountered: A型, nickel coatings on magnetic substrates, and Type B nickel coatings on non-magnetic substrates.

1.4 The effective measurement range of instruments using the magnetic attraction principle is up to 50μm (2 密耳) for type A coatings and up to 25μm (1 米尔) for type B coatings. For gauges based on the principle of flux density variation, the effective range is much larger and measurements up to 1 毫米 (40 密耳) or higher can be made on both types of coatings.

1.5 Measurements made in accordance with this test method shall comply with the requirements of ISO Standard 2361, 印在 1982.

1.6 以 SI 单位表示的值应被视为标准值. 括号内的数值仅供参考.

1.7 本标准并非旨在解决所有安全问题, 如果有的话, 与其使用相关. 本标准的使用者有责任建立适当的安全和健康实践，并在使用前确定监管限制的适用性.