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1、不锈钢酸洗钝化的方法与工艺（Methodandprocessofpicklingpassivationofstainlesssteel）Thispaperiscontributedbyyysshh0DOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyouselectTXTfirstordownloadthesourcefiletothelocalmachine.Stainlesssteelpicklingpassivation
2、methodandprocess1picklingpassivationtreatmentmethod,stainlesssteelequipmentandpartspicklingpassivationtreatmentaccordingtodifferentmethodsofoperation,itsscopeofapplicationandcharacteristicsareshownintable1.Table1Comparisonofpicklingpassivationmethodsforstainl
3、esssteelMethodofimpregnationbrushpastemethodsystemcirculationcirculationsystemofelectrochemicalmethodcanbeusedforparts,andcanbeusedtobrushfieldequipmentsurfacetreatmenttechnologyiscomplex,forDCpowersupplyorpotentiostatscopebutnotsuitableforlargeequipmentforla
4、rgeequipmentinsideandoutsidesurfaceandlocaltreatmentfortheinstallationormaintenanceofthescene,especiallyforweldingdepartmentofmanualoperationandpoorworkingconditions,highproductioncostsprayingmethodforlargeequipment,suchasheatexchanger,shellandtubeprocessingh
5、astheadvantagesofconvenientconstruction,acidsolutioncanbereused,butthepipingandthepumpisconnectedwiththeadvantagesanddisadvantagesoflow;alargevolumeofequipmentwithacidimpregnationliquidconsumptionoftoomuchmanualoperation,poorworkingconditions,acidtheliquidcan
6、notberecycledforon-siteinstallation,largecontainerwithliquidquantityislow,lowcost,fastspeed,buttheneedtoconfigureaspraygunandaringcanbeusedincuttingPicklingbathorpassivationtankparts,picklingliquidcanbeusedforalongtime,highproductionefficiency,cost2acidpassiv
7、ationformulaexamplesof2.1generaltreatment(1)acidreagentHNO36%~25%+HF0.5%~8%(volumefraction);temperature21to60DEGC;thetimeaccordingtotheneed;oragentammoniumcitrate5%~10%(massfraction);temperature49to71DEGC;10min~60min.(2)20%~50%passivationreagentHNO3(volumefra
8、ction);temperature49to71DEGC;10min~30min;orthetemperatureof2lto38DEGC;30min~60min;orHNO3agent20%~50%+Na2Cr207H2O22%~6%(massfraction);temperature49to54DEGC;15~Min30min;orthetemperatureof21
