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ASTM B 530 Document Information:
Title
Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Electrodeposited Nickel Coatings on Magnetic and Nonmagnetic Substrates
ASTM International
Publication Date:
Sep 10, 2002
Scope:
This test method covers the use of magnetic instruments for the
nondestructive measurement of the
thickness of an electrodeposited nickel coating on either a magnetic
or non-magnetic substrate.
These instruments measure either the magnetic attraction between a
magnet and the coating-substrate
combination, or the reluctance of a magnetic flux path passing through
the coating and the basis
metal.
For this test method, there are two types of coating-substrate
combinations that can be
encountered: Type A, nickel coatings on a magnetic substrate, and Type
B, nickel coatings on a
nonmagnetic substrate.
The effective measuring ranges of instruments using the principle of
magnetic attraction are up to
50 for Type A coatings, and up to 25 µm for Type B coatings. For
reluctance gages, the effective
ranges are much greater, and measurements up to 1 mm or more, can be
made on both types of
coatings.
Measurements made in accordance with this test method will be in
compliance with the requirements
of ISO Standard 2361 as printed in 1982.
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.
Keywords:
-
coating thickness
-
magnetic method
-
nickel coatings
-
thickness
-
thickness testing
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