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Chinese Standard: GB/T 30789.7-2015

Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 7:Assessment of degree of chalking by velvet method

IDT  ISO 4628-7:2003

全国涂料和颜料标准化技术委员会(SAC/TC 5)

GB/T 30789的本部分规定了一种粉化等级的评定方法,尤其适用于粗糙表面上的白色或其他色漆涂层和多涂层体系(例如,粗糙度大于ISO 85031规定的粗糙度比较样块G中的第4段)粉化等级评定。

本部分规定的方法也可用于光滑表面上的涂层和多涂层体系粉化等级的评定,但ISO 46286规定的方法更适合。

本试验方法适用于矿物基材上的涂层和多涂层体系,如:纤维水泥板、砖块、混凝土和底层灰浆,测试不受表面结构的影响。经验丰富的操作人员使用本方法很有效,可用于实验室及现场评定。

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