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新型CeO_2改性低温渗铝涂层在模拟燃煤流化床中的冲蚀/腐蚀行为研究
EROSION-CORROSION OF A NOVEL CeO_2-MODIFIED LOW-TEMPERATURE ALUMINIZED COATING IN A SIMULATED COAL-FIRING FBC
查看参考文献9篇
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文摘
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利用Ni与CeO_2纳米颗粒共电沉积在A_3钢表面制备了一层纳米晶结构的Ni-CeO_2复合膜(镍晶粒平均尺寸为60±38 nm),然后在6000℃扩散渗铝5小时获得一种新型CeO_2改性的低温渗铝涂层.同时,在上述条件下制备了单镀镍渗铝涂层以及A_3钢渗铝涂层作为对比.550℃～850℃模拟流化床燃煤环境中100 h冲蚀/腐蚀实验表明,Ni-CeO_2复合膜渗铝涂层较单镀镍渗铝涂层和A_3钢渗铝涂层具有更好的抗冲蚀/腐蚀能力. |
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其他语种文摘
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A novel CeO_2-modified low-temperature aluminized coating was fabricated on a nanostructured Ni-CeO_2 composite film(the mean grain size of Ni grains:60±38nm),which was deposited on an A_3 steel by co-electrodeposition of Ni and CeO_2 nanoparticles from a nickel sulfate bath,and then aluminized by using a conventional halide-activated pack cementation method but at 600℃ for 5 h.An electrodeposited Ni-film-coated A_3 and a bare A_3 were aluminized under the same condition for comparison.The three aluminized coatings were exposed in a laboratory-scale fluidized-bed combustor(FBC) for 100 h in a temperature range of 550～850℃.The result showed that the CeO_2-dispersed aluminized coating exhibited the best oxidation-erosion resistance,due to that it had the hardest surface and maintained the growth of an adherent alumina scale,in contrast,alumina scales formed on the other two aluminized coatings had exhibited a severe cracking and spalling susceptibility,causing a complete degradation of aluminide phases. |
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来源
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腐蚀科学与防护技术
,2008,20(3):176-180 【核心库】
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关键词
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低温渗铝
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纳米晶复合膜
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冲蚀/腐蚀
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流化床
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地址
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中国科学院金属研究所, 金属腐蚀与防护国家重点实验室, 辽宁, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1002-6495 |
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学科
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金属学与金属工艺 |
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文献收藏号
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CSCD:3266998
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