預(yù)氧化Fe-Cr合金在KCl鹽膜下的熱腐蝕行為研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文預(yù)氧化FeCr合金在KCl鹽膜下的熱腐蝕行為研究姓名：劉曉亮申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料連接技術(shù)指導(dǎo)教師：馬海濤20090601預(yù)氧化FeCr合金在KCI鹽膜下的熱腐蝕行為研究StudyofHotCorrosionBehaviorsofPre—oxidizedFeCrAlloysunderKClDepositsAbstractnestudyofhightemperaturecorrosionisveryimpor

2、tantinthedevelopmentofmodernscienceandtechnologyespeciallyforthedevelopmentofindustryincludingenergy、chemicalanddynamicThiSexperimentisbasedonhightemperaturecorrOsionintheenvironmentofwasteincinerationwhichisfoundinthein

3、dustryenvironmentofhi曲temperaturechloridecorrosionInrecentyears，environmentalpollutionandresourceshortageisincreasinglyseriousincinerationhasbeenadoptedasaneffectiveandhygienicmethodfordisposaloftheeverincreasingvolumino

4、usindustrialandmunicipalsolidwasteworld—widelyBut，intheprocessofwasteincinerationmetallicmaterialsusuallyundergoanaggressiveanddegradecompletelybeforetheendofthedesignedlifcduetothecomplexenvironmentThedevelopmentofvolum

5、inousindustrialhasbeenrestrictedResearcherfoundthatchloridecorrosionisthemostimportantfactorofleadingtohightemperaturecorrosionintheenvironmentofwasteincinerationInthewastethereislargeamountofC1TheseChlorideincludeC12、HC

6、landchloridesaltdepositsthesea11leadtoalloycorrosionIntheexperiment，corrosionbehaviorsof5％80％FeCralloysunderKCldepositsweresystematicallyinvestigatedFe一20％CrWaschosentocomparethecorrosionsofwipingKCldirectlyandafterpreox

7、idationat750℃TheeffectofpreoxidationoncorrosionbehaviorsofFeCralloysunderKCldepositswasdiscussedCorrosionbehaviorsofpreoxidized5％~80％FeCralloysat750℃and800℃weteinvestigatedtofindtheeffectofCrcontentoncorrosionbehaviorsof

8、FeCralloysunderKCldepositsThereactionsofFe203andCr20s、ⅣithKClat750℃and800℃wereinvestigatedtoexplainthedamagemechanismofalloyscovedwithFe203andCr203protectivefilmunderKCIdepositsathi【ghtemperaturebyanalyzingkineticsandpro

9、ductsItprovidesusefulresultandtestingdataforselectingmaterialandprotectivecoatingundertheseconditionsTheresultsoftestshowthatCr203produeedbypreoxidationtakesaprotectiveactiononthehotcorrosionofFeCralloysunderKCldepositsI

10、tCanreducecorrosionrate、alleviatedamageofcorrosiontobasealloyandmaintainintegrityofoxidefilmneweightgainandcorrosiondegreeofFeCralloybothreducewhenCrcontentincreasesThecorrosionproductsofpre—oxidizedFe—Cralloyunderliquid