Page 51 - 腐蚀与防护2024年第十一期

张东方, 等: 海洋环境中 CaAl-LDH 对钢筋混凝土寿命的影响

[ 15 ] 周丽娜, 蔡颖, 马财龙, 等. 水滑石复合水泥基材料氯 onadsor p tionca p acit y ofh y drotalciteforchlorideions

离子吸附能力的研究进展[ J ] . 硅酸盐通报, 2023 , 42 incement-basedmaterials [ J ] .BulletinoftheChinese

( 4 ): 1137-1147. CeramicSociet y , 2023 , 42 ( 4 ): 1137-1147.

ZHOULN , CAIY , MACL , etal.Research p ro g ress

EffectofCaAl-LDHonServiceLifeofReinforcedConcreteunderMarineEnvironment

1 , 2 1 , 2 1 , 2 1 , 2 3
ZHANGDon g fan g , LIUGuo q ian g , CHEN Haoxian g , FANZhihon g , TIANKetin g

( 1.Ke yLaborator y ofHarbor& MarineStructureDurabilit yTechnolo gy , Ministr y ofTrans p ort , Observationand

ResearchBaseofTrans p ortIndustr y ofLon g -TermPerformancesofMarineInfrastructure ,

CCCCFourthHarborEn g ineerin g InstituteCo. , Ltd. , Guan g zhou510230 , China ;

2.NationalObservationandResearchStationofMaterialCorrosionandStructuralSafet y of

Hon gKon g -Zhuhai-MacaoBrid g einGuan g don g , Zhuhai519060 , China ;

3.TheSecondEn g ineerin gCom p an y ofCCCCFourthHarborEn g ineerin gCo. , Ltd. , Guan g zhou510230 , China )

Abstract : Calciumaluminumla y ereddoubleh y droxides ( CaAl-LDH ) werep re p aredb yco- p reci p itationandionexchan g e

method.TheeffectofCaAl-LDHonthechloridecorrosionresistanceofrebarinsimulatedconcretep oresolutionandthe

im p ro vementoftheservicelifeofreinforcedconcreteinsimulatedmarineenvironmentwerestudiedb yelectrochemicaltest

method.Theresultsshowthattheexchan g ebetweenCaAl-LDH andchlorideiononthesurfaceofrebarincreasedthe

p assivationp otentialofrebarb y nearl y 200mV , andthe p assivationran g ewasex p anded.CaAl-LDHcouldeffectivel y reduce

thechlorideioncontentinconcrete , thec hlorideiondiffusioncoefficientandthemassfractionofchlorideiononsurfacewere

reducedb y 63.6%and55.3%res p ectivel y , andtheservicelifeofreinforcedconcretestructurewas p rolon g ed.

Ke ywords : marineenvironment ; reinforcedconcrete ; la y ereddoubleh y droxide ( LDH ); corrosionp rotection ; servicelife

( 上接第22页)

CorrosionInhibitionofEnamineEth y lImidazolineinClosedCoolin gWaterS y stemof

NuclearPowerPlants

1 , 2 1 , 2 1 , 2 3 1 , 2 1 , 2
XIAOYan , TIANZhaohui , LINGenxian , WANGLin , SONGLi j un , SUNYun

( 1.SuzhouNuclearPowerResearchInstituteCo. , Ltd. , Suzhou215004 , China ;

2.NationalEn g ineerin gResearchCenterforNuclearPowerPlantSafet y& Reliabilit y , Suzhou215004 , China ;

3.NuclearandRadiationSafet yCenter , MEE , Bei j in g 102445 , Chin a )

Abstract : Thecorrosioninhibitionofenamineeth y limidazoline ( IM ) to20Gcarbonsteel , ake ymaterialofclosedcoolin g

water ( CCW ) s y stem , wasstudiedb y immersioncorrosiontest , electrochemicaltestandsurfaceanal y sisunderthesimulated

o p eratin g conditionsofCCWs y steminnuclear p ower p lants , anditsinhibitionmechanismwasanal y zed.Thethermalstabilit y

anal y sisofIMintheCCWs y stemenvironmentwasinvesti g atedb y thermo g ravimetricanal y sis.WhenthemassfractionofIM

was30m g / k g , theinhibitionefficienc yofIMto20Gcarbonsteelcouldreachmorethan99%.Addin g60m g / k gIMinto

demineralizedwaterhadthesamecorrosioninhibitioneffectasaddin g75 m g / k gsodium p hos p hate ( corrosioninhibition

efficienc ymorethan99.9% ) .WiththeincreaseofIMcontent , thefre ecorrosion p otentialof20Gcarbonsteelmovedforward

andthecorrosioncurrentdensit ydecreased.TheIM moleculesbe g antodecom p oseatabout240 ℃ , andthedecom p osition

wasbasicall y com p letedat500℃.IMisananodiccorrosioninhibitor , whichalleviatescorrosionb y adsorbin g andformin g a

p rotective filmonthesurfaceof20Gcarbonsteel.

Ke ywords : imidazoline ; 20Gcarbonsteel ; closed coolin gwater ( CCW ); corrosioninhibition ; adsor p tion
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