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首页> 外文期刊>Electrochimica Acta >Corrosion protection of 1Cr18Ni9Ti stainless steel by polypyrrole coatings in HCl aqueous solution
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Corrosion protection of 1Cr18Ni9Ti stainless steel by polypyrrole coatings in HCl aqueous solution

机译：盐酸溶液中聚吡咯涂层对1Cr18Ni9Ti不锈钢的腐蚀防护

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摘要

Electrically conducting polypyrrole (Ppy) coatings doped with sodium dodecylsulfate (SDS) have been deposited on 1Cr18Ni9Ti stainless steel by anodic polymerization from aqueous solutions of pyrrole and sodium dodecylsulfate. The corrosion behavior of Ppy coated steel was investigated in 0.3 M HC1 aqueous solution at room temperature by a combination of electrochemical measurement techniques and scanning electron microscopy. The steel is in active state at the open circuit potential and suffers from pitting corrosion when the polarization potential is higher than 210 mV versus SCE. The Ppy coating can increase the corrosion potential of the steel by more than 600 mV versus SCE, and the pitting corrosion potential by more than 500 mV versus SCE. Fifty-day exposure experiments indicated that the Ppy coating shows high stability, and can inhibit effectively the corrosion of the steel.
机译：掺杂有十二烷基硫酸钠（SDS）的导电聚吡咯（Ppy）涂层已通过吡咯和十二烷基硫酸钠水溶液的阳极聚合反应沉积在1Cr18Ni9Ti不锈钢上。结合电化学测量技术和扫描电子显微镜，研究了在0.3 M HCl水溶液中室温下Ppy涂层钢的腐蚀行为。相对于SCE，极化电位高于210 mV时，钢在开路电位下处于活动状态，并且会遭受点蚀。与SCE相比，Ppy涂层可将钢的腐蚀电势提高600毫伏以上，与SCE相比，点蚀腐蚀电势可提高500毫伏以上。五十天的暴露实验表明，Ppy涂层显示出很高的稳定性，并且可以有效地抑制钢的腐蚀。

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