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建立一维阵列微电极技术,通过对阵列电极腐蚀电位、极化曲线以及微电极之间宏电流的测量,研究在腐蚀环境作用下钢筋混凝土腐蚀过程中宏电池电流和微电池电流的形成、发展及其相互作用.结果表明,腐蚀发生早期,腐蚀宏电池和微电池在不同区域优先形成而且并存.随着腐蚀的发展,受氧扩散控制,在腐蚀宏电池区域出现微电池,而某些腐蚀微电池区域与阴极区耦合,也形成腐蚀宏电池.腐蚀宏电池与微电池电流大小最终趋于一致.
A one-dimensional array microelectrode technique was established to study the formation and development of macro-cell current and micro-cell current during corrosion of reinforced concrete under the action of corrosive environment by measuring the corrosion potential of the array electrode, the polarization curve and the macro-current between microelectrodes And their interaction.The results show that in the early stage of corrosion, the macroscopical and microcells eroded preferentially and coexisted in different regions.With the development of corrosion, under the diffusion control of oxygen, the appearance of micro-cells in the area of macrocell corrosion, and some corrosion Micro-cell area coupled with the cathode area, also formed a macro-corrosion corrosion.Corrosion of macro-cell and micro-cell current size eventually tends to be consistent.