（精选）Sa检测标准

Sa1Lightblast-cleaning轻度喷砂（Brush-offBlastCleaning”清扫级喷砂）Thesurfaceshallbefreefromvisibleoil,greaseanddirt,andfrompoorlyadheringmillscale,rust,paintcoatingsandforeignmatter(water-solublesaltsandweldingdebris).SeephotographsBSa1,CSa1andDSa1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（水溶解盐和焊接碎片）。见照片BSa1,CSa1andDSa1Sa2Thoroughblast-cleaning彻底喷砂（CommercialBlastCleaning经济喷砂清理）Thesurfaceshallbefreefromvisibleoil,greaseanddirt,andfrommostofthemillscale,rust,paintcoatingsandforeignmatter.Anyresidualcontaminationshallbefirmlyadhering.SeephotographsBSa2,CSa2andDSa2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。任何残余污染物应该被坚固地粘结。见照片BSa2,CSa2andDSa2Sa2.5Verythoroughblast-cleaning完全彻底的喷砂Thesurfaceshallbefreefromvisibleoil,greaseanddirt,andmillscale,rust,paintcoatingsandforeignmatter.Anyremainingtracesofcontaminationshallshowonlyasslightstainsinthefromofsportsorstripes.SeephotographsASa2.5,BSa2.5,CSa2.5andDSa2.5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应该只是显示出以条纹形式出现的微小的污点。见照片ASa2.5,BSa2.5,CSa2.5andDSa2.5Sa3Blast-cleaningtovisuallycleansteel喷砂至金属材料原色Thesurfaceshallbefreefromvisibleoil,greaseanddirt,andshallbefreefrommillscale,rust,paintcoatingsandforeignmatter.Itshallhaveauniformmetalliccolor.SeephotographsASa3,BSa3,CSa3andDSa3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。应该有一个均一的金属颜色。见照片ASa3,BSa3,CSa3andDSa3SUMMARY–FORMULAS公式1:DFT干膜厚=WFT湿膜厚x%Solids固体份100%2:WFT湿膜厚=DFT干膜厚x100%%Solids固体份3:WFT湿膜厚=DFT干膜厚x(100+%Thinning稀释比率)%Solids固体份4:Litersofpaint油漆升数=Area(㎡)面积xDFT干膜厚10x%Solids固体份5:Theoreticalspreadingrate=%solids固体份x10理论涂布率DFT干膜厚Wetfilmthickness–ISO2808湿膜厚度—ISO28081.Combgauge梳式膜厚仪Thewetfilmgaugeconsistsofastainlesssteelcomb,theouterteethofwhichformabaseline.Theinnerteethareprogressivelyshortersoastopresentarangeofgapsbetweentheteethandthebaseline.Thesizeofeachgapcanbereadfromascaleonthegaugeinmicrons.湿膜仪由不锈钢材质组成，外部的齿牙形成了一个基线，内部齿牙逐渐减小以体现出基线和内齿牙的差异.从膜厚仪上的每组间隙都可读出微米数。Thewetfilmthicknesshastobemeasuredimmediatelyafterapplication.Thecombisplacedfirmlyontothesubstrateinthewetfilm.Removethegauge,andexaminetheteethtodeterminewhichistheshortestonetotouchthewetpaintfilm.Recordthefilmthicknessaslyingbetweenthelast“touching”toothandthefirst“non-touching”tooth.Takeatleasttwoorthreefurtherreadingstoobtainarepresentativeresultoverthepaintedsurface.Afterusethecombshouldbecleanedproperly.湿膜仪必须在涂装开始时立即使用，蓖梳仪要垂直放在湿膜的表面，然后拿开仪器，确认接触湿膜上的最短的齿牙，记录下最后一个接触油漆的梳齿和最早一个没有接触油漆的梳齿之间的读数，就是湿膜厚度，使用完膜厚仪后，要正确地清洗。Thewetfilmgaugecanbeusedfortheallkindsofpaints,howeveritcanbedifficulttomeasuretozinc-ethylsilicatepaintswherethesolventsevaporateveryquickly.Alsoproblemswillarisewhenthewetfilmgaugeisusedonthesecondcoatofphysicaldryingpaints(theyredissolve).Thecombsareusuallymadeofstainlesssteel,butsomepaintmanufacturerswillalsosupplytheminplastic.湿膜仪表盘很难测量无机富锌漆表面，因为它挥发速度快。如果底层油漆是物理干燥油漆，在使用湿膜仪测量二道漆膜时会出现问题（底漆将会被溶解）。梳式膜厚仪常由不锈钢制成，但一些油漆生产商也会提供塑料制品。