Sa检测标准

Sa 1Light blast-cleaning 轻度喷砂（Brush-off Blast Cleaning” 清扫级喷砂）The surface shall be free from visible

Light blast-cleaning Brush-off Blast Cleaning” 轻度喷砂（清扫级喷砂） The surface shall be free from visible oil, grease and dirt, and from poorly adhering mill scale, rust, paint coatings and foreign matter (water-soluble salts and welding Sa 1 debris). See photographs BSa 1, CSa 1and DSa 1 表面应该没有可见的油迹、油脂、灰尘、来自附着力不好的氧化铁皮、铁锈、旧涂层和其它杂质（水 BSa 1, CSa 1and DSa 1 溶解盐和焊接碎片）。见照片 Thorough blast-cleaning Commercial Blast Cleaning 彻底喷砂（经济喷砂清理） The surface shall be free from visible oil, grease and dirt, and from most of the mill scale, rust, paint coatings and foreign matter. Any residual contamination shall be Sa 2 firmly adhering. See photographs BSa 2, CSa 2and DSa 2 表面应该没有可见的油迹、油脂、灰尘、大部分的氧化铁皮、铁锈、旧涂层和其它杂质。任何残余污 BSa 2, CSa 2and DSa 2 染物应该被坚固地粘结。见照片 Very thorough blast-cleaning 完全彻底的喷砂 The surface shall be free from visible oil, grease and dirt, and mill scale, rust, paint coatings and foreign matter. Any remaining traces of contamination shall show only Sa as slight stains in the from of sports or stripes. See photographs ASa 2.5, BSa 2.5, 2.5 CSa 2.5 and DSa 2.5 . 表面应该没有可见的油迹、油脂、污垢、氧化铁皮、铁锈、旧涂层和其它杂质任何残余的污染物痕迹 ASa 2.5, BSa 2.5, CSa 2.5 and DSa 应该只是显示出以条纹形式出现的微小的污点。见照片 2.5 Blast-cleaning to visually clean steel 喷砂至金属材料原色 The surface shall be free from visible oil, grease and dirt, and shall be free from mill scale, rust, paint coatings and foreign matter. It shall have auniform metallic color. Sa 3 See photographs ASa 3, BSa 3, CSa 3and DSa 3 表面应该没有可见的油迹、油脂、灰尘、污垢、没有氧化铁皮、铁锈、旧涂层及其它杂质。应该有一 ASa 3, BSa 3, CSa 3and DSa 3 个均一的金属颜色。见照片 SUMMARY –FORMULAS 公式总结 1: DFT =WFTx %Solids 干膜厚湿膜厚固体份 100 % 2: WFT =DFT x100 % 湿膜厚干膜厚 %Solids 固体份 3: WFT =DFT x(100 +% Thinning ) 湿膜厚干膜厚稀释比率 %Solids 固体份 4: Liters of paint =Area (㎡) xDFT 油漆升数面积干膜厚 10 x% Solids 固体份 5: Theoretical spreading rate =% solids x10 固体份 DFT 理论涂布率干膜厚 Wet film thickness –ISO 2808 —ISO 2808 湿膜厚度 1. Comb gauge 梳式膜厚仪 The wet film gauge consists of astainless steel comb, the outer teeth of which form a baseline. The inner teeth are progressively shorter so as to present arange of gaps between the teeth and the baseline. The size of each gap can be read from ascale on the gauge in microns. 1