卟啉在纯铁表面上的化学与电化学修饰

通过在卟啉的丙酮－水溶液中循环阳极电位扫描，在工业纯铁表面形成一层修饰层．此修饰层呈淡黄色，结晶细密．与基体结合牢固，耐腐蚀性能良好．质谱分析及反射红外分析说明有铁卟啉螯合物生成．若将工业纯铁直接浸入卟啉的丙酮－水溶液中，其表面同样也可形成一层修饰膜, 此膜较之电化学修饰层疏松而厚．卟啉在纯铁表面的电化学修饰层与化学修饰膜的形成机制有着本质的不同．

Chemical and Electrochemical Modification of Porphyrin on Pure Iron Surface

Electrochemical modification of metal surface is an effective means for anticorrosion brought forward recently.The moamcation of porphyrin on iron was investigated in this work. The modified layer was formed on industrial pure iron surface using cyclic anodic potential sweep method in acetone and water solution containing porphyrin. The modification conditions and effect factors were studied. The modilied layer has good anticorrosion performance especially in hydrochloric acid solution. The moamed film also can be obtained on the pure iron by chemical modification. But its corrosion resistance is worse than the electrochemical modified layer. The surface morphology, composition and structuxe of modified layer were analysed by reflective infrared spectroscopy, ion thecroanalysis and SEM. The forming mechanism of modified layer was discussed.