GB/T 1720-2020: Circle-drawing test of coating films

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Newer / historical versions: GB/T 1720-2020

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Scope

This Standard specifies a test method to evaluate the peeling degree of the
coating film from the substrate, when the overlapping cycloid diagram
penetrates the coating film to the substrate.
This Standard applies to the determination of circle-drawing test of a single flat
coating film on a hard substrate.
The performance that is measured by this experimental test method not only
depends on the adhesion of the coating to the substrate, but also on various
other factors; so, this test method cannot be regarded as a method for
measuring adhesion.

Basic Data

Standard ID	GB/T 1720-2020 (GB/T1720-2020)
Description (Translated English)	Circle-drawing test of coating films
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G50
Classification of International Standard	87.040
Word Count Estimation	7,797
Date of Issue	2020-11-19
Date of Implementation	2021-10-01
Older Standard (superseded by this standard)	GB/T 1720-1979
Regulation (derived from)	National Standard Announcement No. 26 of 2020
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration