鈰和硼對HSn70-1合金耐蝕性能影響的研究.pdf

1、中南大學(xué)碩士學(xué)位論文鈰和硼對HSn701合金耐蝕性能影響的研究姓名：黃政權(quán)申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：張勝華20050526中南大學(xué)碩學(xué)位論文ABSlllACTABSTRACTBras$condensertubeisanimportantbasismaterialinelectricpowerindustryItisagreatsubjectinbothindustryandresearchareatodevelopa

2、llAsfreebrassalloyforcondensertubeAnewHSn70lCBalloywithCeandBadditionsinHSn70—1isinvestigatedinpresentpaperThecorrosionpropertymechanicalpropertiesandmicrostructureofthepreviousalloyhavebeenstudiedbymeansofgalvano—chemis

3、try，XRDSEMTEMandtensiletestThemainresultsareasfollows：111emechanicalpropertiesandcorrosionresistanceofHSn701alloycanbeimprovedwithareasonableamountofCeandBadditions，butexcessiveamountofCeandBmayresultsindecreaseofmechani

4、calpropertiesTheoptimumcontentofCeandBiS5：8inatomrationeresultsofgalvanochemistrytestshowthatwhentheatomratioofCeandBreaches5：8theallOYmayexhibitthelowestpassivatingCurrentdensity(Icorr)andcorrosionrateCeandBaddition$mak

5、eiteasytoOCCUrpassivatingreactionandtoformahomogeneousfilm，whichistightandwellbondedtothematrixinhibitingdezincificationeffectivelyandincreasingcorrosionresistanceThecolddeformedHSn701CBalloyCanachieveexcellentcorrosionr

6、esistancebyannealingisgasshieldat400“Cfor1hourWimtheaboveresultsitcailbeconcludedthatHSn70—1ABalloywithAsandBadditionsCanbesubstitutedbyHSn70—1CBalloywithadditionsofCeandBKEYWORDS：HSn70—1CBalloycorrosionresistance，dezinc