GB/T 20624.2-2006: Paints and varnishes -- Rapid-deformation (impact resistance) tests -- Part 2: Falling-weight test, small-area indenter

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Scope

This Part of GB/T 20624 specifies a method for rapidly deforming, by using a
spherical indenter of diameter 12.7 mm or 15.9 mm to impact a coating film and its
substrate. And evaluate the effect of such deformation.
Note: The term “impact resistance” is included in the title and text of this Part, but one important
characteristic of the apparatus used is that it should produce rapid deformation rather than a true impact.
This test method should be restricted to testing in only one laboratory when numerical
values are used because of the poor reproducibility of the method. Interlaboratory
agreement is improved when ranking is used in place of numerical values.

Basic Data

Standard ID	GB/T 20624.2-2006 (GB/T20624.2-2006)
Description (Translated English)	Paints and varnishes -- Rapid-deformation (impact resistance) tests -- Part 2: Falling-weight test, small-area indenter
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G51
Classification of International Standard	87.040
Word Count Estimation	9,950
Date of Issue	2006-09-01
Date of Implementation	2007-02-01
Quoted Standard	GB/T 3186-2006; GB/T 9271; GB 9278; GB/T 13452.2; ISO 1513-1992
Adopted Standard	ISO 6272-2-2002, IDT
Regulation (derived from)	China Announcement of Newly Approved National Standards No. 11 of 2006 (No. 98 overall)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies a diameter of 12. 7mm or 15. 9mm spherical punch impact caused by the coating and substrate deformation and deformation of its rapid assessment of the results of test methods. When the numerical results, poor reproducibility of this test method, therefore restricted to the same laboratory test. If instead of the numerical results with the grading can improve the consistency between laboratories.