基于混凝土内部环境引发机制的钢筋脱钝及锈蚀研究进展

Progress in research on passivation and corrosion of steel bar based on initiation mechanism of internal environment of concrete

钢筋腐蚀是混凝土结构耐久性劣化的重要原因之一。从钢筋钝化膜的成因及脱钝机理、围绕钢筋锈蚀的模拟孔溶液和电化学试验方法以及pH值和以氯离子为代表的阴离子对钢筋脱钝和锈蚀带来的影响等方面,总结了近年来国内外基于混凝土内部环境引发的钢筋脱钝以及锈蚀的研究进展,并对相关领域的进一步研究方向提出了展望。

Steel bar corrosion is one of the important reasons for durability deterioration of reinforced concrete structures.The research progress of steel bar debonding and corrosion caused by concrete internal environment at home and abroad in recent years is summarized from the aspects of the forming and debonding mechanism of steel passivation film,the simulated pore solution and electrochemical test method surrounding steel corrosion,and the influence of pH value and anion represented by chloride ion on steel debonding and corrosion.Furthermore,the further research direction of this fields is also prospected.