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AS 2331.1.4-2001 (R2017) Methods of test for metallic and related coatings - Method 1.4: Local thickness tests - Magnetic induction and eddy current methods

Abbreviation
AS 2331.1.4-2001
Valid from
17/07/2001

Information provider
SAI Global
Author
Standards Australia
Information type
Australian Standard
Format
PDF


Description

This Standard specifies requirements for two methods of local thickness testing. The magnetic induction method is suitable for the measurement of thickness of gold, silver, tin, cadmium, lead and organic coatings on magnetic substrates. The eddy current method is suitable for measurement of thickness of anodic coatings and organic coatings on aluminium.

Scope

This Standard sets out the requirements for the following non-destructive methods for the measurement of the local thickness of metallic and non-metallic coatings:

  • (a) Magnetic induction (low frequency) method The magnetic induction method is used for the thickness testing of non-magnetic and non-metallic coatings on magnetic substrates.
  • (b) Eddy current (high performance) method The eddy current method is used for the thickness testing of
    • (i) a non-conductive coating on a non-magnetic substrate; and
    • (ii) a metallic coating or a non-metallic coating on a substrate that has appreciably different conductivity.

These methods apply when the coating thickness is not less than 2 mm, and the surface contour permits calibration of the test instrument.

The magnetic induction (low frequency) method is suitable for the measurement of thickness of gold, silver, tin, cadmium, zinc, copper, chromium, lead and organic coatings, such as paints and plastics, on magnetic substrates.

The eddy current (high frequency) method is suitable for the measurement of thickness of oxide coatings on metals. Using selected frequencies, it is also possible to measure the thickness of various metallic coatings on either magnetic or non-magnetic substrates, e.g. tin-lead on copper, silver on nickel/silver, copper, zinc, cadmium or tin on steel, and copper or silver on a non-metallic base.

Under the best conditions of use, these methods are accurate to 0.7 mm, or 10%, whichever is the greater.

Notes:

  1. Factors affecting the accuracy of measurement are given in Appendix A.
  2. The methods given in this Standard are not suitable for the measurement of chemical conversion coatings.
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This resource is cited by:

AS 2331.1.4-2001 (R2017) Methods of test for metallic and related coatings - Method 1.4: Local thickness tests - Magnetic induction and eddy current methods

This document is CITED BY:

AS 2331.1.4-2001 (R2017) Methods of test for metallic and related coatings - Method 1.4: Local thickness tests - Magnetic induction and eddy current methods

Description

This Standard specifies requirements for two methods of local thickness testing. The magnetic induction method is suitable for the measurement of thickness of gold, silver, tin, cadmium, lead and organic coatings on magnetic substrates. The eddy current method is suitable for measurement of thickness of anodic coatings and organic coatings on aluminium.

View on Information Provider website
AS 2331.1.4-2001 (R2017) Methods of test for metallic and related coatings - Method 1.4: Local thickness tests - Magnetic induction and eddy current methods
Description

This Standard specifies requirements for two methods of local thickness testing. The magnetic induction method is suitable for the measurement of thickness of gold, silver, tin, cadmium, lead and organic coatings on magnetic substrates. The eddy current method is suitable for measurement of thickness of anodic coatings and organic coatings on aluminium.

View on Information Provider website
This resource does not cite any other resources.

AS 2331.1.4-2001 (R2017) Methods of test for metallic and related coatings - Method 1.4: Local thickness tests - Magnetic induction and eddy current methods

This resource does not CITE any other resources.
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