由于混凝土的隔离和高绝缘性 ,常规的电化学技术、微探针扫描技术均难于获得在腐蚀介质的浸泡下混凝土 /钢筋界面 ,特别是不同深处的混凝土 /钢筋界面的电位分布 .本文提出用阵列电极法并结合电子技术和微机控制技术 ,获得同一水平面上混凝土 /钢筋界面以及不同深处的混凝土 /钢筋界面的电位分布立体信息图 .结果表明 :在NaCl介质中经过一段时间的浸泡 ,混凝土中的钢筋腐蚀可发生并发展 ;而在Na2 SO4 介质中经过一段时间的浸泡 ,虽钢筋腐蚀一般不发生 ,但混凝土可能破坏 .不同深处混凝土 /钢筋界面腐蚀优先发生在混凝土覆盖较浅的部位 .
胡荣宗
,
林昌健
,
周香
,
谭建光
,
赵雄超
. 腐蚀介质中混凝土/钢筋界面电极电位分布的立体分析[J]. 电化学, 2000
, 6(2)
: 227
-232
.
DOI: 10.61558/2993-074X.1385
The iron array electrode covered with concrete as a new electrochemical technique is applied to map the potential imaging and to investigate on the iron electrode corrosion process under concrete: In Cl - solution the corrosion of the iron array electrode covered with concrete had been prevented for a short term since the concrete protection, but the corrosion still occurreed and developed after immersed for a long time. In SO 4 2- solution although the sample had being immersed for a long time and the concrete was possibly broken, the corrosion did not develop. In Cl - solution the corrosion of the iron array electrode covered with concrete in deferent deeps occurred first where the concrete covered was thin.
[1] LiuXiaomin ,etal.Astudysurveyofdestructioncausedbyreinforcingsteelinconcrete[J].MaterialsProtec tion(CailiaoBaohu) ,1996 ,2 9(6 ) :16～ 19.
[2 ] WaterGW .Acriticalriviewofd .c .electrochemicaltestsforpaintedmeatal[J].Corrosion ,Science ,1986 ,2 6 :39～ 47
[3] LinChangjian ,TianZhaowu_wu .Scanningmicro_referenceelectrodetechniqueformeasuringthepotentialdistributiononmicroareasofmetalsurfaceⅡthepotentialdistributionofsomelocalizedcorrosion[J].Jour nalofChineseSocietyforCorrosionandProtection(ZhongguoFushiyuFanghuXuebao) ,1982 ,2 :9～ 15 .
[4 ] LinChang_jian ,ZhuoXiang_dong ,ChenJi_dong ,etal.Corrosionpotentialimagingatinterfaceofpolymericcoatingmetalbyarrayelectrodetechnique[J].JournalofChineseSocietyforCorrosionandProtection(Zhong guoFushiyuFanghuXuebao) ,1997,17(1) :7～ 10 .
[5 ] LinChang_jian ,etal.Corrosionpotentialimagingattheinterfaceofcoating/metalbyanewelectrochemicaltechnique[J].Electrochemistry(Chinese) ,1996 ,2 (2 ) :144～ 148.
[6 ] HuRon_zong .Themethodformeasuringpotentialandcurrentdistributionofmetalcorrosioninsteam[D].MasterThesis ,Xiamen :XiamenUuiversity ,1981.
[7] DengShun_yang .Thesimplestatingaboutthecorrosionandprotectionofconcrete[J].CorrosionandProtec tion(FushiyuFanghu) .1985 (3) :40～ 41.
