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

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Scope

This Standard specifies the method of using coating thickness instruments of the magnetic type
for nondestructive measurements of the thickness of non-magnetic coatings (including vitreous
and porcelain enamel coatings) on magnetic basis metals.
The method is applicable only for measurements on reasonably flat specimens. In the case of
nickel coatings on non-magnetic substrates, the preferred method is that specified in GB/T
13744.

Basic Data

Standard ID	GB/T 4956-2003 (GB/T4956-2003)
Description (Translated English)	Non-magnetic coatings on magnetic substrates-Measurement of coating thickness-Magnetic method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	A29
Classification of International Standard	25.220.40
Word Count Estimation	5,540
Date of Issue	2003-10-29
Date of Implementation	2004-05-01
Older Standard (superseded by this standard)	GB/T 4956-1985
Quoted Standard	GB/T 12334; GB/T 13744
Adopted Standard	ISO 2178-1982, IDT
Regulation (derived from)	China Announcement of Newly Approved National Standards No. 14 of 2003 (No. 62 overall)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary	This standard specifies the use of non-destructive magnetic gauge to measure AIDS substrate metal non-magnetic coatings (including ceramic and porcelain grab layer) thickness method. This method applies only to the appropriate level of the sample is also measured on a non- magnetic body of zinc on his cap thickness measurement precedence GB/T 13744 method specified.