HotWorkingTechnology2010,Vol.39,No.14Material&HeatTreatment20107,[1]。,,。,,,、,[2]。。[3]、、、。,、。。SugehisLiscano[4]、,,,,;、,MinnamariVippola[5]Al2O3,Al(PO3)3,0.3mm,Al(PO3)3,,,。,,1,,,,。11.12.6~2.8,800,,SiO2,、、。,、、、1,2,1(1.,330029;2.,330031):,,,750℃。,,,。,。:;;;:TG174.442:A:1001-3814(2010)14-0096-03StudyonSealingTreatmentandAcid-resistantPropertiesofThermalSprayingCoatingZHOULinyu1,LIUYing2,XIEHui1(1.SchoolofScienceandTechnology,NanchangUniversity,Nanchang330029,China;2.MechatronicsEngineeringSchool,NanchangUniversity,Nanchang330031,China)Abstract:Thesealantwithcorrosionresistanceathightemperaturewasdeveloped.Thesealingtestonthermalsprayingcoatingsurfacewascarriedoutusingbrushingandultrasonicinfiltrationmethod.And,acidcorrodingexperimentswerecarriedoutatroomtemperatureand750℃.Theresultsshowthattheporesofthecoatingsurfacearebasicallysealed,sealingagentsandnano-particlescanpenetrateintotheporesofthecoating,therebyreducetheporosityofthecoating.Thesealantcanobviouslyreducetheporosityandshieldthealkali,salty,andacidproofofthecoatings,speciallythethermostablecorrosionpropertyaregreatlyimproved.Keywords:thermalspraying;sealant;porosity;corrosionathightemperature:2010-03-17:“”(2009-2010):(1981-),,,,;:13617915191;E-mail:zhly3038866@sina.com.cn96《》20103914Material&HeatTreatment、、、。,,。,,,,。SiO2,,、、、,、、,。,SiO2,,,。,SiO2。,、SiO2,1∶13,1∶90[6]。1.2Q235(70mm×45mm×8mm);316,(,%):C≤0.08,Si≤1.00,Mn≤2.00,P≤0.045,S≤0.030,16.0~18.0Cr,10.0~14.0Ni,2~3Mo。、。TLAS-0.5mm,:40V,220A,160mm,6MPa[7]。1.3:10min;(10min);,,。1.4,500~1000℃。,750℃,7∶3Na2SO4+K2SO4,20.0~30.0mg/cm2,、。750℃,5h,;、、(40h)。,GR-300(0.1mg)。,,,,,。:①,,,,;②,100℃20min;③5h,750℃;。22.11。,,2。1(a),1(b),,,,,。2,。1Fig.1Thesurfacemorphologiesofcoatingbeforeandaftersealing(a)(b)(a)(b)2Fig.2Thepolishingsurfacemorphologiesofcoatingbeforeandaftersealing97HotWorkingTechnology2010,Vol.39,No.14Material&HeatTreatment20107(a)(b)(c)4Fig.4Surfacemorphologyaftercorrosion2.2。8,3。,,,。,,25h,,,40h40.694mg/cm2。,,,。。,。。,。35h,。,,,。,。34。,,45403530252015105051015202530354045/h/(mg·cm-2)3Fig.3Dynamiccorrosioncurves;,,;,。4(1)、SiO2,1∶13、1∶90,、、。(2),。,,。(3)750℃,。,。:[1],.[M].:,2001.[2],,,.[J].,2006,(11):15-18.[3],,.[J].,2004,(7):41-43.[4]SugehisLiscano,LindaGil,MarianaHS.Effectofsealingtreatmentonthecorrosionresistanceofthermal-sprayedceramiccoatings[J].SurfaceandCoatingsTechnology,2004,188-189:135-139.[5]MinnamariVippol,SamppaAhmaniemi.Aluminumphosphatesealedaluminacoating:characterizationofmicrostructure[J].MaterialsScienceandEngineering,2002,A323:1-8.[6],,,,[J].(),2009,(3):205-216.[7],,.[J].,2008,37(7):77-78.98