一、前言外加电流阴极保护技术至今已有七十余年历史,它在水工、港工钢结构防护上的应用开始于五十年代初期。当时,美国、澳大利亚、日本等国先后对船闸、水闸的钢闸门以及海港栈桥、钢桩码头等采用外加电流阴极保护,取得了明显的效果。五十年代后 I. INTRODUCTION Impressed current cathodic protection technology has been more than seventy years old. Its application in the field of hydraulic engineering and harbor steel structure protection started in the early 1950s. At that time, the United States, Australia, Japan and other countries successively applied the current cathodic protection to the ship gates, the steel gates of sluices and the harbor trestle, steel piles and docks, and achieved remarkable results. After the fifties