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
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。
钛合金
垃圾焚烧电站
灰水混合液
点蚀
duplex stainless steel
titanium alloy
waste incineration power plant
mixed solution of ash and water
pitting
Abstract
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.
中图分类号 TG172 DOI 10.11973/fsyfh-202302001
所属栏目 试验研究
基金项目 上海自然科学基金（20ZR1421500）；上海市科委项目（19DZ2271100）
收稿日期 2021/3/30
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: GE Fang,GE Honghua,YU Huaqiang,LI Ji,ZHANG Jialin,LIU Jiaman. Corrosion Resistance of Several Metal Materials in Corrosive Environment of Low-Temperature Flue Gas in a Waste Incineration Power Plant[J]. Corrosion & Protection, 2023, 44(2): 1
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【5】黄林凯, 方志, 刘润. 垃圾焚烧锅炉常用钢材耐高温腐蚀性能对比试验[J]. 西部特种设备, 2020, 3(4):24-27, 45.
【6】杨二娟, 刘福广, 常绍峰, 等. HVAF喷涂Inconel 625涂层在生物质发电环境的高温腐蚀行为[J]. 中国表面工程, 2020, 33(4):136-144.
【7】韦震高, 朱霖, 魏玉伟, 等. 一台生物质发电锅炉的过热器管高温腐蚀分析[J]. 装备制造技术, 2019(8):97-98, 111.
【8】周振华, 薛东剑, 罗昭强, 等. 生物质锅炉高温过热器腐蚀失效分析[J]. 热能动力工程, 2017, 32(10):128-131, 148.
【9】蒋旭光, 刘晓博. 垃圾焚烧锅炉关键受热面腐蚀研究进展及方向思考[J]. 中国腐蚀与防护学报, 2020, 40(3):205-214.
【10】VAINIO E, KINNUNEN H, LAURÉN T, et al. Low-temperature corrosion in co-combustion of biomass and solid recovered fuels[J]. Fuel, 2016, 184:957-965.
【11】周彬, 宗仰炜, 葛红花. 某电厂余热锅炉烟气侧低温段受热面的腐蚀积垢原因[J]. 腐蚀与防护, 2021, 42(2):60-64, 69.
【12】SHI Y T, ZHANG X Y, LI F, et al. Engineering acid dew temperature:the limitation for flue gas heat recovery[J]. Chinese Science Bulletin, 2014, 59(33):4418-4425.
【13】YANG L T, PABALAN R T, JUCKETT M R. Deliquescence relative humidity measurements using an electrical conductivity method[J]. Journal of Solution Chemistry, 2006, 35(4):583-604.
【14】YANG L T, JUCKETT M R, PABALAN R T. Conductivity behavior of salt deposits on the surface of engineered barrier materials for the potential high-level nuclear waste repository at yucca mountain, Nevada[J]. MRS Online Proceedings Library, 2004, 824(1):77-83.
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【16】YANG X J, DU C W, WAN H X, et al. Influence of sulfides on the passivation behavior of titanium alloy TA2 in simulated seawater environments[J]. Applied Surface Science, 2018, 458:198-209.
【17】RECCAGNI P, GUILHERME L H, LU Q, et al. Reduction of austenite-ferrite galvanic activity in the heat-affected zone of a Gleeble-simulated grade 2205 duplex stainless steel weld[J]. Corrosion Science, 2019, 161:108198.
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