KS M ISO 8502-2-2021 涂料和相关产品使用前钢衬底的制备.表面清洁度评定试验.第2部分:清洁表面上氯化物的实验室测定
Preparation of steel substrates before application of paints and related products — Tests for the assessment of surface cleanliness —Part 2: Laboratory determination of chloride on cleaned surfaces