目前工业上防止地下管道,轮船和贮藏桶的金属腐蚀的主要方法是牺牲阳极的阴极保护法.这种金属防腐蚀的方法是用一根金属棒(锌或镁)做为阳极与被保护的金属(铁、铜或铅)做为阴极相连结,并使整个装置保持在腐蚀环境里.此时,阳极受到氧化作用而释放出电子并传递给阴极金属,使阴极金属被保护,直至阳极被耗尽为止.因此阳极材料必须定期更换. At present, the main method of preventing metal corrosion in underground pipelines, ships and storage tanks is to sacrifice the anode’s cathodic protection method. This kind of metal corrosion protection method uses a metal rod (zinc or magnesium) as the anode and is protected. The metal (iron, copper, or lead) is connected as a cathode, and the entire device is kept in a corrosive environment. At this time, the anode is oxidized to release electrons and transferred to the cathode metal so that the cathode metal is protected until the anode is protected. Depleted so anode material must be replaced regularly.