GB/T 4956-2025 Active National standards

GB/T 4956-2025 Non-magnetic coatings on magnetic substrates—Measurement of coating thickness—Magnetic method

Publish Date: 2025-10-31 Implement Date: 2026-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 4956-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Material protection

ICS Name: \nMetal plating

Publish Date: 2025-10-31

Implement Date: 2026-05-01

Pages: 36 pages

Scope

This document describes a non-destructive measurement method for the thickness of non-magnetic coatings on magnetic substrates.
This measurement method is accessible and non-destructive for typical coatings. The probe or instrument with an integrated probe is directly placed on the coating to be measured. The coating thickness is displayed on the instrument.
This document is applicable to the thickness measurement of paints and varnishes, electroplated layers, enamel coatings, plastic coatings, powder coatings, and cladding layers.
Note: This method is also used to measure the thickness of magnetic coatings on non-magnetic substrates made of metal or other materials (see GB/T 13744).

Development Information

Word Count: 54 Thousand words Pages: 36 pages

Replace the following standards

GB/T 4956-2003 Non-magnetic coatings on magnetic substrates—Measurement of coating thickness-Magnetic method

Referenced Standards

GB/T 5206-2015 Paints and varnishes—Terms and definitions GB/T 5206.1-1985 Paints and varnishes—Vocabulary—Part 1:General terms GB/T 5206.2-1986 Paints and varnishes—Vocabulary—Part 2:Terminology of resins GB/T 5206.3-1986 Paints and varnishes—Vocabulary—Part 3:Pigment terms GB/T 5206.4-1989 Paints and varnishes—Vocabulary—Part 4:Terminology relating to physical and chemical properties of coatings and films GB/T 5206.5-1991 Paints and varnishes—Vocabulary—Part 5:Terminology relating to defects of coatings and films GB/T 6379.1-2004 Accuracy(trueness and precision)of measurement methods and results—Part 1:General principles and definitions GB/T 12334-2001 Metallic and other inorganic coatings—Definitions and conventions concerning the measurement of thickness ISO/IEC Guide 98-3

Adopt standards

ISO 2178:2016

Related Standards

GB/T 6462-1986 Replaced

GB/T 6462-1986 Metallic and oxide coatings—Measurement of coating thickness—Microscopical method

Publish Date: 1986-06-11

GB/T 6463-1986 Replaced

GB/T 6463-1986 Metallic and other non-organic coatings—Review of methods of measurement of thickness

Publish Date: 1986-06-11

GB/T 6465-1986 Replaced

GB/T 6465-1986 Metallic and other non-organic coatings—Corrodkote corrosion test(CORR test)

Publish Date: 1986-06-11

GB/T 6466-1986 Replaced

GB/T 6466-1986 Electrodeposited chromium coatings—Electrolytic corrosion testing (EC test)

Publish Date: 1986-06-11

GB/T 6808-1986 Abolished

GB/T 6808-1986 Anodizing of aluminium and its alloys—Accelerated test of light fastness of coloured anodic oxide coatings using artificial light

Publish Date: 1986-08-28

GB/T 8013-1987 Replaced

GB/T 8013-1987 Anodizing of aluminium and aluminium alloys—General specifications for anodic oxidation coatings

Publish Date: 1987-06-26