D-葡萄糖酸钠对模拟混凝土孔隙液中钢筋的缓蚀作用

Study on the anticorrosion of D-sodium gluconate on reinforcing steel in simulated concrete pore solution

应用电化学阻抗谱研究D-葡萄糖酸钠对含有氯离子的模拟混凝土孔隙液中钢筋的缓蚀作用,并对其缓蚀机理进行探索。结果表明,0.01mol/L D-葡萄糖酸钠对钢筋具有良好的缓蚀效果,其缓蚀作用主要是通过在钢筋表面和氯离子竞争吸附,最终形成一层吸附膜对钢筋起到保护作用。

The inhibiting effect of D-sodium gluconate on the reinforcing steel immersed in the simulated concrete pore solution with 0.1mol/L NaCl was studied by EIS. The results indicate that 0. 01mol/L D-sodium glueonate has a good effect on the reinforcing steel in antieorrosion. The reinforcing steel is prevented from corrosion by the formation of an adsorptive film on the steel surface because the glueonate anions compete against the chloride ions in the adsorption.