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从五十年代起,日、澳、英、美、丹、德、苏、法等国相继在海港钢板桩结构物的防腐方面,推广应用了阴极保护技术。现综述如下:一、保护方法与效益(1)日本从1953年到1965年在港湾工程中广泛采用的是外加电流法,但是这种方法需要维护管理。近年来,由于水下电焊技术的广泛采用,加之功效高、成本低的铝合金牺牲阳极研制成功与大量生产,所以,在日本已广泛地代之以铝合金牺牲阳极法。然而,总保护电流在500安以上的大型港工钢结构物还是选用外加电流法较为有利。
Since the 1950s, Japan, Australia, Britain, the United States, Denmark, Germany, the Soviet Union, France and other countries have successively applied the cathodic protection technology in the anticorrosion of steel sheet pile structures in the harbor. Now summarized as follows: I. Protection Methods and Benefits (1) The applied current method is widely applied in harbor engineering from 1953 to 1965 in Japan. However, this method requires maintenance and management. In recent years, due to the widespread use of underwater welding technology, coupled with high efficiency, low cost aluminum sacrificial anode developed successful and mass production, so, in Japan has been replaced by aluminum sacrificial anode method. However, it is more advantageous to use an impressed current method for large-scale Hong Kong steel structures with a total protection current above 500A.