水環(huán)境中改進型腐蝕電化學傳感器的研制與應用.pdf

1、水環(huán)境中改進型腐蝕電化學傳感器的研制與應用DevelopmentandApplicationsofImprovedElectrochemicalCorrosionsensorinAquaticEnvironment國家自然科學基金重大項目(No50499335)國家科技支撐計劃項目(2007BAB27804)碩士學位論文學科專業(yè)：撾魁堂研究生：至盔指導教師：塞遺蜇麴援天津大學材料科學與工程學院二零零八年八月ABSTRACTMonitor

2、inganddetectingcorrosionofmetalstructuresinanaquaticenvironmentisaneffectivewaytodecreasedamagescausedbycorrosionproblemsofthemItmakesgreatsensetodevelopatypeofelectrochemicalcorrosionsensorswhichcouldconductmeasurements

3、directlyontargetstructures，inwhichwayusefulinformationconcerningcorrosionprocesscouldbeobtainedWhenelectrochemicalmeasurementsareapplieddirectlytOthosestructures，thekeypointistestrictthesignaldistributionSothisworkstarte

4、dwithaninvestigationofeffectsofvariousconfigurationsoftheelectrodesystemonthesignaldistributionTheexperimentalparametersinvolvedinthisworkwere：theareaoftheauxiliaryelectrode(SA)，thedistancebetweentheauxiliaryelectrodeand

5、theworkingelectrode(D)，andtheresistivityofelectrolyteItwasfoundthatinelectrolyteofhighresistivitysuchasdistilledwaterandtapwatershorteningDordecreasingSAcouldyielddecreaseinsignaldistributionHoweversucheffectswerenotobse

6、rvedinseawaterwhichhasamuchlowerresistivityAnelectrochemicalcorrosionsensorwasdesignedandfabricatedonthebasisoffindingsshownabove，anditwasthenevaluatedinlaboratoryItwasfoundthatthesensorwascapableofrestrictingresponsesig

7、naldistributioninsomeresistivemediumssuchastapwaterandastablepotentialofitsreferenceelectrodewasalsoobservedduringthetestInaddition，thesensorwasusedondifferentpositionsofanironplatecoatedwithrustresistantzinctomeasurepol

8、arizationresistanceTheresultsshowedthatmeasurementsperformedonpositionsofdifferentsurfaceconditionswouldyielddifferentvalues。whichmeansafinecurrentconfinementiSachievedwiththeuseofthesensotKEYWoRDS：corrosionelectrochemic