用户:muge　2021-05-08上传　侵权/申诉　本论文发表于电镀与涂饰杂志,属于电力相关论文范文材料。仅供大家论文写作参考。　–04Causesanalysisonwhitishdefectoftrivalentchromiumpassivationfilmonhot-dipgalvanizedsteelsheetandcountermeasures//SONGYi-feng*,LITing-ting,YUEChong-xiang,CAIZhi-qing,LIHua-longAbstract:Tosolvethewhitishdefectoftrivalentchromiumpassivationfilmonhot-dipgalvanizedsteelsheet,thestainandcorrosionresistanceofpassivationfilmwereexaminedbycolordifferencemeasurementandneutralsaltspraytesting.Themicroscopicmorphologyandelementalcompositionofpassivationfilmwereanalyzedusingopticalmicroscope(OM),scanningelectronmicroscope(SEM),andenergy-dispersivespectrometer(EDS).Theresultsshowedthatthestainandcorrosionresistanceofthewhitishsampleswasworsethanthatofthenormalones.Thewhitishdefectwasmainlyresultedfromthenonuniformfilmformationduetothegrindingtextureofcoatingrollerandtheporousstructurecausedbycuringatinsufficientlyhightemperature.Thefailureraterelatedtowhitishdefectwasdecreasedfrom1.2%tolessthan0.1%bytakingthefollowingmeasures:improvingthegrindingaccuracyofcoatingroller,optimizingthegrindingprocess,andincreasingthecuringtemperature.Keywords:hot-dipgalvanizing;trivalentchromiumpassivation;whitishdefect;corrosionresistance;coatingrollerFirst-author`saddress:InstituteofResearchofIronandSteel,Shasteel,Zhangjiagang215625,China