ASTM B 499 Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals
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ASTM B 499 Document Information:
Title
Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals
ASTM International
Publication Date:
Apr 10, 1996
Scope:
This test method covers the use of magnetic instruments for the
nondestructive measurement of the
thickness of non-magnetic coatings over ferrous or other magnetic base
metals.
NOTE 1 - Autocatalytically deposited nickel-phosphorus alloys
containing more than 8 % phosphorus
are sufficiently nonmagnetic to be measured by this test method, as
long as the measurement is made
prior to any heat treatment.
These instruments measure either the magnetic attraction between a
magnet and the basis metal, as
influenced by the presence of the coating, or the reluctance of a
magnetic-flux path passing
through the coating and the basis metal.
Measurements made in accordance with this test method will be in
compliance with the requirements
of ISO International Standard 2178 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
- coatings
- magnetic method
- nonmagnetic coatings
- thickness
- thickness testing
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