GB/T 18570.9-2005
涂覆涂料前钢材表面处理 表面清洁度的评定试验 第9部分;水溶性盐的现场电导率测定法
Preparation of steel substrates before application of paints and related products.Tests for the assessment of surface cleanliness.Part 9:Field method for the conductometric determination of water-soluble salts
GBT18570.9-2005, GB18570.9-2005