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盐水预热器受杂散电流等因素的腐蚀严重.为防止杂散电流的腐蚀,提高盐水预热器的使用寿命,采用TH—847涂料防护.用TH—847涂料防腐与用钛材、黄铜等贵金属和用电化学保护相比具有耐蚀性好,操作简单、施工成本低等特点.七十年代末,金属阳极电解槽在永新—沈化开始应用,现有金属阳极电槽192台,除离子膜碱外,烧碱生产能力为12万吨/年.应用金属阳极电槽与石墨糟相比具有糟电压低、寿命长、污染少等优点.由于槽电压的降低和电流效率的提高,金属阳极电槽比石墨阳极电稽可节电15～20%,但金属阳极槽宜在较高电流密度下运转,这些优点才明显.可随着电流密度的提高,在电槽附近的盐水管、碱液管、泵、阀、盐水预热器等设备的腐
Brine preheater by the stray current and other factors serious corrosion.In order to prevent the stray current corrosion, improve the service life of salt water preheater, the use of TH-847 paint protection. TH-847 paint with anti-corrosion and titanium, yellow Copper and other precious metals and electrochemical protection compared with good corrosion resistance, simple operation, low construction costs and other characteristics of the late seventies, metal anode electrolyzer in Yongxin - Shen began to apply, the existing metal anode tank 192 Taiwan, in addition to the membrane alkali, the caustic soda production capacity of 120,000 tons / year.Application of metal anode cell worse than graphite bad, low voltage, long life, less pollution, etc. Due to the reduction of tank voltage and current efficiency Improve, the metal anode cell than the graphite anode can be 15% to 20% of electricity, but the metal anode tank should be run at higher current density, these advantages were obvious. With the current density can be increased in the vicinity of the tank Brine, lye, pumps, valves, brine preheater and other equipment rot