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用失重法和电化学方法研究了PC-602缓蚀剂(化学组份为多元醇磷酸酯、聚磷酸盐和磷酸盐)对0.16～3.5%NaCl溶液(含Cl~-1000～22000ppm)中碳钢的缓蚀作用,测定了极化曲线。结果表明,100～300ppm缓蚀剂的缓蚀率可达95～97%,对阴极电化学过程有强烈的抑制作用。应用AES分析研究了缓蚀膜的化学组份及其深度分布,发现在Cl~-含量高于4000ppm的NaCl溶液中,Cl~-可嵌入碳钢表面形成的缓蚀膜表而层中,溶液中Cl~-浓度对Cl~-嵌入膜中的量有一定影响。
The effects of PC-602 corrosion inhibitor (chemical composition of polyols, polyphosphates and phosphates) on the carbon content of 0.16 ~ 3.5% NaCl solution (containing Cl ~ -1000 ~ 22000ppm) Inhibition of steel corrosion, measured the polarization curve. The results show that the corrosion inhibition rate of 100 ~ 300ppm corrosion inhibitor can reach 95 ~ 97%, which has a strong inhibitory effect on the cathode electrochemical process. The chemical composition and depth distribution of the corrosion inhibition film were studied by using AES analysis. It was found that in the NaCl solution with Cl ~ - content higher than 4000ppm, Cl ~ - can be embedded in the surface layer of corrosion inhibition film formed on the surface of carbon steel, The concentration of Cl ~ - has a certain influence on the amount of Cl ~ - embedded in the membrane.