Tribocorrosion behavior of Ni-17.5Si-29.3Cr alloy in sulfuric acid solution

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1、ARTICLEINPRESSTribologyInternational42(2009)1081–1087ContentslistsavailableatScienceDirectTribologyInternationaljournalhomepage:www.elsevier.com/locate/tribointTribocorrosionbehaviorofNi-17.5Si-29.3CralloyinsulfuricacidsolutionQinlingBi,WeiminLiu,JiqiangMa,J

2、unYang,YupingPu,QunjiXueStateKeyLaboratoryofSolidLubrication,LanzhouInstituteofChemicalPhysics,ChineseAcademyofSciences,Lanzhou730000,PRChinaarticleinfoabstractArticlehistory:ThetribocorrosionpropertyofaNi-17.5Si-29.3CralloyagainstaSi3N4ballwasstudiedincompar

3、isonReceived24April2008withAISI321stainlesssteelusingaball-on-diskreciprocatingtribotesterin1Msulfuricacid(H2SO4)Receivedinrevisedformsolution.Theeffectsofloadandslidingspeedonthetribocorrosionpropertiesofthealloywere26February2009investigated.Theresultsindic

4、atedthatthewearrateofthealloyincreasedwhilethefrictioncoefficientAccepted16March2009decreasedwithincreasingload.ThewearrateofthealloyincreasedlinearlywithincreasingslidingAvailableonline24March2009speedandthefrictioncoefficientincreasedintheinitialstagesandthen

5、remainedconstantwithKeywords:increasingslidingspeed.Thewearmechanismsweremainlymicroploughing,uniformcorrosionandNi-17.5Si-29.3Cralloypittingcorrosion.Undertheexperimentalconditionsofthepresentstudy,theNi-17.5Si-29.3CralloyTribocorrosionshowedexcellentcorrosi

6、on-resistenceandanti-wearabilitycomparedwithAISI321stainlesssteel.H2SO4&2009ElsevierLtd.Allrightsreserved.Wear1.IntroductionMoreresearchisneededtofurtherstudythetribocorrosionprocessincludingnewcorrosionresistantandanti-wearmateri-Tribocorrosionisoneoftheextr

7、emeconditionspresentals,aswellasthetribocorrosionmechanisms.inengineeringprocess.ItisatribologicalprocesswherethetotalInmostcasesofthetribocorrosionprocess,stainlesssteelsuchmaterialremovalresultsinsimultaneousmechanicalwearasAISI321isthefirstchoiceoftheanti-c

8、orrosionmaterial,butitandchemicalcorrosion.Thetwomaterial-removalmechanismsisnotalwaystheproperchoiceinallthecases,suchasaslidingdependoneachotherinacomplicatedwayandthetotalcontactinacor