AS 2331.1.3-2001 (2017) PDF

Full title and description

Methods of test for metallic and related coatings — Method 1.3: Local thickness tests — Magnetic method. Specifies the use of magnetic-type coating-thickness instruments for non‑destructive measurement of non‑magnetic coatings (including vitreous and porcelain enamel) on magnetic basis metals.

Abstract

This Standard gives the procedure, calibration and verification requirements, accuracy limits and reporting conventions for local (point) thickness measurements using magnetic methods. It covers instrument calibration (foils and coated standards), probe positioning, influence of curvature and edge effects, number of readings and techniques to ensure reliable, repeatable results.

General information

• Status: Current — reconfirmed (reconfirmed notice 4 July 2017).
• Publication date: 19 June 2001.
• Publisher: Standards Australia.
• ICS / categories: Surface engineering; coating thickness measurement; non‑destructive testing; metallic and related coatings.
• Edition / version: 2nd edition (AS 2331.1.3-2001).
• Number of pages: 8.

Scope

Specifies a magnetic sensing method for non‑destructive local thickness measurement of non‑magnetic coatings applied to magnetic base metals. The method is intended for reasonably flat specimens; for nickel coatings on non‑magnetic substrates other methods (for example AS 2331.1.4 or ISO 2361) are preferred. Appendix A gives factors affecting measurement accuracy.

Key topics and requirements

• Principle of magnetic‑type coating thickness meters and their correct use.
• Calibration: use of calibration foils and coated reference standards; verification procedures and frequency.
• Measurement technique: probe positioning, handling edge effects and curvature, surface cleanliness, and effects of residual magnetism.
• Accuracy and uncertainty requirements for routine measurements and reporting formats.
• Guidance on number and distribution of readings and special cases (lead coatings, direction of mechanical working).

Typical use and users

Used by coating inspectors, quality assurance personnel, testing laboratories, fabricators and maintenance engineers who need quick, non‑destructive local thickness checks on painted or enamelled ferrous components. It is frequently referenced in procurement and quality plans where magnetic base metal substrates are present.

Related standards

Part of the AS 2331 series (Methods of test for metallic and related coatings). Related parts include local thickness by cross‑section (micrographic) methods, magnetic induction and eddy‑current variants (e.g. AS 2331.1.1, AS 2331.1.4), and overseas standards such as ISO 2361 and ISO 2064 referenced for definitions and alternate methods.

Keywords

coating thickness, magnetic method, non‑destructive testing, calibration, coated standards, enamel coatings, ferrous substrates, AS 2331, thickness gauge, measurement accuracy

FAQ

Q: What is this standard?

A: An Australian Standard (AS 2331.1.3-2001) that specifies a magnetic method for local, non‑destructive measurement of non‑magnetic coatings on magnetic base metals.

Q: What does it cover?

A: Procedure and principles for magnetic coating‑thickness instruments, calibration and verification, handling of edge and curvature effects, required number of readings, accuracy limits and reporting. Appendix A describes factors affecting accuracy.

Q: Who typically uses it?

A: Coating inspectors, QA/QC teams, testing laboratories, fabricators and maintenance engineers for routine on‑site or shop floor thickness checks on ferrous items.

Q: Is it current or superseded?

A: The 2001 edition is current and was formally reconfirmed in 2017; it remains in force (reconfirmation notice dated 4 July 2017). Users should check with Standards Australia or authorized distributors for any later revisions.

Q: Is it part of a series?

A: Yes — AS 2331 is a multi‑part series covering methods of test for metallic and related coatings (various local and average thickness methods, corrosion tests, etc.). This part is Method 1.3 (magnetic local thickness).

Q: What are the key keywords?

A: coating thickness, magnetic method, non‑destructive, calibration, ferrous substrate, enamel, AS 2331.1.3.