垃圾焚烧电站低温烟气侧腐蚀环境中几种金属材料的耐蚀性  

Corrosion Resistance of Several Metal Materials in Corrosive Environment of Low-Temperature Flue Gas in a Waste Incineration Power Plant

作　　者：葛放 葛红花 于华强 李骥 张嘉琳 刘家满 GE Fang;GE Honghua;YU Huaqiang;LI Ji;ZHANG Jialin;LIU Jiaman(Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai Engineering Research Center of Energy-Saving in Heat Exchange Systems,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学上海热交换系统节能工程技术研究中心上海市电力材料防护与新材料重点实验室,上海200090

出　　处：《腐蚀与防护》2023年第2期1-6,86,共7页Corrosion & Protection

基　　金：上海自然科学基金(20ZR1421500);上海市科委项目(19DZ2271100)。

摘　　要：采用极化曲线、微区电化学测试和表面微观形貌观察等方法研究了两种双相不锈钢2205 DSS和2507 DSS、两种钛合金TA2和TA10在垃圾焚烧电站低温余热利用段换热器烟气侧灰水混合液中的腐蚀行为,比较了这4种金属材料的耐蚀性。结果表明:两种双相不锈钢的耐蚀性均随浸泡时间的增加而下降,浸泡3 d后表面均出现电流密度突增的活性位点,表面发生点蚀;2205 DSS在浸泡8 d后出现了全面腐蚀,其耐蚀性最差;在试验过程中,两种钛合金未见明显腐蚀,其耐蚀性能明显优于两种双相不锈钢。Corrosion behavior of two duplex stainless steels 2205 DSS and 2507 DSS,two titanium alloys TA2 and TA10 in mixed solution of ash and water on the flue gas side of a low-temperature heat exchanger for waste heat utilization in a waste incineration power plant was studied by polarization curve,micro-area electrochemical testing and microscopic surface morphology observation.And the corrosion resistance of these metals was compared.The results showed that the corrosion resistance of 2205 DSS and 2507 DSS decreased with the increase of immersion time.After 3 days of immersion,active sites where current density increased suddenly appeared,and pitting corrosion occurred on the surface of 2205 DSS and 2507 DSS.2205 DSS was general corroded after 8 days of immersion,showing the lowest corrosion resistance in the four metals.There was no obvious corrosion occurred in TA2 and TA10 during test,and their corrosion resistance was significantly better than those of two duplex stainless steels.

关 键 词：双相不锈钢 钛合金 垃圾焚烧电站 灰水混合液 点蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]