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1、一判断题:判断下面的论述是否正确,在答题纸上相应的题号后面标・・・Atrueorfalse:thefollowingdiscusseswhethertheright,ontheanswersheetcorrespondingqidbehindthetick(right)or(wrong)(eachitem15iteminthistopic,twopoints,atotalof30points)YoucanusethecorrosioncelIstodoworkontheoutside・Theanodeof
2、thebatteryisoxidized.Thelowestconcentrationofthereactantsonthesurfaceoftheelectrodewhentheconcentrationofpolarizationisdiffused・Theweightmethodcanbeusedtomeasuretheextentofthedamagc.Polarizationisameasureofresistancetotheelectrodeprocess.Fromthepointofvie
3、wofcorrosionprotection,themetalelectrodewithlowervoltagethanthefemalematerialshouldbechosen.Whentheelectrochemicalanodeisprotected,itispossibletoestimatethesizeofthecorrosionvelocitythroughthesizeofthedullcurrent.Itisnotadvisabletoadoptacathodicprotection
4、method.Thepittingsystemisthecorrosionofthesmallcathodelargeanode・Theabsolutepotentialofthehydrogenelectrodeiszero.Basedontheelectricsequenceofthemetal,thesizeofthecorrosioncurrentcanbecalculated.Theelectrodepotentialofaluminumalloyatthesacrificialanodeins
5、eawateristheequilibriumelectrodepotentia1.Thecorrosioncontrolfactorscanbeusedtodeterminethecorrosionprocess・Thecathodethatisetchedbyhydrogenisahydrogenion.Thecorrosionofmetalmaterialsinthenaturalenvironment(atmosphere,soil,water)isanelectrochemicalcorrosi
6、on.Choosethecorrectanswer,writethecorrectanswerontheanswersheet,andchoosethecorrectanswer・Wehaveatotalofabout30pointsforeachofthe15questions・Measuringelectrodepotential,usinghighresistaneevoltmeter,isthereasonA.avoidthepolarizationoftheworkelectrodeC.Avoi
7、dthepassivationoftheelectrodes・AvoidthepassivationoftheworkelectrodeThematerialthatcannotbeusedasasteelequipmentforsacrificialanodeisA.alloyb.highsiliconcastironc.zincalloyd.magnesiumalloyAsteeltubethatdeliversneutralcoppersulphate,whichisthemostlikelytod
8、epolarizethesteelpipe・A.Copperionb.sulfatec.hydroxided.hydrogenThecorrosivetypeofgraphitecastironisthetypeofcorrosionA.corrosionb・selectivecorrosionThetaffillineisappliedtotheactivationpolarizationsystemA.linearpola
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