GB/T 30789.3-2014
色漆和清漆 涂层老化的评价 缺陷的数量和大小以及外观均匀变化程度的标识 第3部分:生锈等级的评定
Paints and varnishes.Evaluation of degradation of coatings.Designation of quantity and size of defects,and of intensity of uniform changes in appearance.Part 3:Assessment of degree of rusting
GBT30789.3-2014, GB30789.3-2014