ASTM B530 Standard test Method for Magnetic Measurement of Coating Thickness: 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.
Значење и употреба

5.1 Дебљина премаза је генерално важна за његове перформансе. 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 “Standard test method for Measuring Coating thickness by magnetic method: Electrodeposited nickel Coatings on magnetic and non-magnetic substrates”

Корак 1: Обим

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. Намењен је да допуни упутства произвођача о раду инструмента, да их не замени.

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

1.3 For this test method, two types of coating-substrate combinations can be encountered: Type A, 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 mils) for type A coatings and up to 25μm (1 mil) 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 мм (40 mils) 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, штампано у 1982.

1.6 Вредности изражене у СИ јединицама сматрају се стандардним. Вредности дате у заградама су само за референцу.

1.7 Овај стандард није намењен да реши све безбедносне проблеме, ако их има, повезана са његовом употребом. Одговорност корисника овог стандарда је да успоставе одговарајуће безбедносне и здравствене праксе и да утврде применљивост регулаторних ограничења пре употребе.