GB/T 39494-2020: Determination for Coating Adhesion of Rare Earth Permanent Magnetic Materials for Drive Motor of New Energy Vehicle

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Scope

This Standard specifies the determination method for coating adhesion of rare earth
permanent magnetic materials for the drive motors of new energy vehicles. There are
four methods in total, including the pull method, shear method, cross-cut method and
thermal shock method, all of which are destructive test methods.
This Standard is applicable to the determination of the single-layer or multi-layer
coating adhesion o of rare-earth permanent magnetic materials for drive motors of new
energy vehicles. Coatings include the ones using electroplating, electrophoresis,
spraying, physical vapor deposition, chemical plating and coatings other technologies
(rare earth permanent magnetic materials with coating are hereinafter referred to as
coating products).
NOTE: The pull method and the shear method are suitable for the determination of coating
products with a flat surface; and the cross-cut method and thermal shock method are suitable
for the determination of coating products of any size.

Basic Data

Standard ID	GB/T 39494-2020 (GB/T39494-2020)
Description (Translated English)	Determination for Coating Adhesion of Rare Earth Permanent Magnetic Materials for Drive Motor of New Energy Vehicle
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H14
Word Count Estimation	10,182
Date of Issue	2020-11-19
Date of Implementation	2021-10-01
Regulation (derived from)	National Standard Announcement No. 26 of 2020
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration