卟啉在纯铁表面电化学修饰层的缓蚀作用

CORROSION RESISTANCE OF PURE IRON SURFACEELECTROCHEMICALLY MODIFIED BY PORPHYRIN

采用稳态极化曲线、极化阻力、电化学阻抗谱等多种电化学测试方法,研究了硫酸、盐酸、氯化钠、氢氧化钾等溶液中卟啉在纯铁表面电化学修饰层的缓蚀作用。研究结果表明,卟啉电化学修饰层对铁基金属有很好的保护作用。在酸性、中性和碱性溶液中均有良好的阻蚀性能。尤其在盐酸溶液中,修饰层具有更佳的效果。氯离子的协同效应与修饰层的结构有密切关系。根据实验结果、对修饰层的缓蚀机理进行了探讨。

In this paper the electrochemical modification of porphyrin on industrial pure iron was investigated.Using some electrochemical techniques,such as polarization resistance method,polarization curve and electrochemical impedance spectroscopy(EIS),the anti-corrosion performance of modified layer in various solutions was discussed.The modification conditions were Studied.The research results show that the modification layer of porphyrin on industrial pure iron surface has good corrosion resistance,especially in hydrochloric acid solution.The anti-corrosion mechanism of modification layer was discussed.