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通过腐蚀电位、线性极化法与循环极化法等电化学方法研究了细晶粒钢和普通低碳钢在模拟混凝土孔溶液中的均匀腐蚀与点蚀行为,并考虑了砂磨和未处理两种钢筋表面状况对钢筋腐蚀行为的影响.结果表明,细晶粒钢与普通低碳钢在模拟液中的耐均匀腐蚀的能力很接近;砂磨钢筋的钝化效果比未处理钢筋好;腐蚀末期砂磨钢筋表现出比未处理钢筋更强的抑制均匀腐蚀能力.循环极化测试表明:砂磨钢筋由于其相对均匀的表面组织形貌,故表现出比未处理钢筋更好的抑制点蚀能力;其次,由于细晶粒钢含有较多晶界,晶界处含有较多易发生点蚀的夹杂,故表面未处理细晶粒钢发生点蚀的概率稍大于未处理低碳钢.
The uniform corrosion and pitting corrosion behavior of fine grain steel and ordinary low carbon steel in simulated concrete pore solution were studied by means of electrochemical methods such as corrosion potential, linear polarization and cyclic polarization. Sanding and untreated The results show that the ability of fine grain steel and common mild steel to resist uniform corrosion in the simulated liquid is very close to each other. The passivation effect of sanding steel is better than that of untreated steel. At the end of the corrosion, the sanding steel showed stronger inhibition of uniform corrosion than the untreated steel.Phospheric polarization tests showed that the sanding steel showed a better suppression point than the untreated steel due to its relatively uniform surface texture Second, since the fine grain steel contains more grain boundaries and contains more pitting corrosion easily in the grain boundaries, the probability of pitting corrosion of the surface-untreated fine grain steel is slightly larger than that of the untreated mild steel.