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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 .
Due to the segregation of the concrete and the high insulation, it is difficult to obtain the potential distribution of the concrete / steel interface, especially the concrete / steel interface in different depth under the immersion of the corrosive medium by the conventional electrochemical technique and the microprobe scanning technique. Using the array electrode method combined with the electronic technology and the microcomputer control technology, the three-dimensional information map of the potential distribution of the concrete / steel interface and the concrete / steel interface at different depths on the same horizontal plane was obtained.The results showed that: after soaking in NaCl medium for a period of time, Corrosion of concrete in rebar can occur and develop, but in Na2 SO4 medium after a period of immersion, although rebar corrosion generally does not occur, but the concrete may be damaged.Different deep concrete / rebar interfacial corrosion preferentially occurs in the concrete cover shallow Site.