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9部分:丝状腐蚀等级的评定
Paints and varnishes―Evaluation of degradation of coatings―Designation of quantity and size of defects,and of intensity of uniform changes in appearance―Part 9: Assessment of degree of filiform corrosion