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建立一种阵列电极技术,通过测量不同时空的微电极腐蚀电位、电偶电流及其动态变化,研究了在腐蚀介质作用下,混凝土中钢筋腐蚀发生、发展早期过程阳极区和阴极区分布特征,探讨了钢筋腐蚀过程宏观腐蚀电池与微观腐蚀电池的相互作用机制.结果表明,伴随着点腐蚀的发生、发展过程,在钢筋/混凝土界面宏观腐蚀电池的作用明显,宏观腐蚀电池电流分布与腐蚀电位有密切的对应关系.混凝土中钢筋腐蚀过程总是存在着宏观腐蚀电池和微观腐蚀电池,二者密切相关、相互作用,对钢筋局部腐蚀的发生、发展过程有重要影响.
An array electrode technology was established. By measuring the corrosion potential, galvanic current and dynamic changes of microelectrode in different time and space, the corrosion of rebar in concrete was studied under the action of corrosive medium. The distribution characteristics of anode and cathode in the early stage of development were studied. The interaction mechanism between macroscopical corrosion cell and microcosmic corrosion cell was discussed.The results showed that with the occurrence and development of pitting corrosion, the effect of macroscopic corrosion on the cell / concrete interface was obvious, and the current distribution and corrosion potential There is a close correspondence between the corrosion process of steel in the concrete there is always macro-corrosion cells and micro-corrosion cells, the two are closely related, interaction, the local corrosion of steel has an important impact on the occurrence and development process.