Took hydrogen embrittlement cracking accident at titanium pipe-mouth in the seawater cooler in Shanghai Petrochemical Company Limited for example, critical potential of titanium absorption hydrogen and appropriate potential of cathodic protection for seawater cooler made of titanium and copper were discussed. The selected sacrificial anode should meet the condition of prevent titanium absorb hydrogen and protect copper. For the purpose of applicable sacrificial anode in the Hangzhou Bay seawater coolers made of titanium and brass, pure Fe, Fe-9Ni and Fe-6Cr-4Ni samples had been studied by electrochemical test and immersion test. The result showed Fe-9Ni was the best one for anode. Fe-9Ni anodes had been used in two condensers successfully.%以上海石化海水冷却器铁管口氢脆开裂事故为例,探讨了铁吸氢临界电位及钛铜共用海水冷却器的合适阴极保护电位,选用的牺牲阳极既要防止钛氢脆,又要保护铜不腐蚀.进而为适用于杭州湾海水的钛铜共用海水冷却器的牺牲阳极进行了开发,以纯铁、Fe-9Ni与Fe-6Cr-4Ni三种阳极试样做电化学测试与浸泡腐蚀等试验,得到Fe-9Ni阳极为最佳选择,并在两台复水器上使用,效果良好.
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