为了进一步改善离子镀NiCrAlY涂层的抗热腐蚀性能,采用粉末包埋法在离子镀NiCrAlY涂层表面上进行渗铝,研究了涂层渗铝前后在850℃含氯硫酸盐膜下的热腐蚀行为.结果表明:在25%NaCl+75%Na2SO4熔盐中850℃热腐蚀40h时,未渗铝的NiCrAlY涂层生成的是外层以Cr2O3为主的氧化膜,渗铝后的NiCrAlY涂层仅生成一层Al2O3膜;未渗铝的NiCrAlY涂层在腐蚀50h后失去保护作用,而渗铝涂层在腐蚀100h后表面仍形成以Al2O3为主的保护膜.因此,渗铝处理可以明显提高原涂层的抗热腐蚀性能.
参考文献
| [1] | 刘培生,梁开明,周宏余.High-temperature protective coatings on superalloys[J].中国有色金属学会会刊(英文版),2002(04):798-803. |
| [2] | Richard C S;Béranger G;Lu J et al.The influences of heat treatments and interdiffusion on the adhesion of plasma NiCrAlY coatings[J].Surface and Coatings Technology,1996,82:99-109. |
| [3] | Li S.;Fayeulle S.;Treheux D.;Langlade C. .Influence of the microstructure of plasma deposited MCrAlY coatings on their tribological behaviour[J].Surface & Coatings Technology,1998(1/3):7-11. |
| [4] | Warnes BM. .Improved aluminide/MCrAlX coating systems for super alloys using CVD low activity aluminizing[J].Surface & Coatings Technology,2003(0):106-111. |
| [5] | 李铁藩.金属高温氧化和热腐蚀[M].北京:化学工业出版社,2003:258-262. |
| [6] | Z.Tang;F.Wang .Hot-Corrosion Behavior of TiAl-Base Intermetallics in Molten Salts[J].Oxidation of Metals,1999(3/4):235-250. |
| [7] | 张杰,陶凯,崔华,周香林,张济山.AC-HVAF喷涂高铬镍基合金纳米结构涂层的热腐蚀性能研究[J].表面技术,2007(06):18-21. |
| [8] | 舒勇华;王福会;周龙江 等.在500-700℃水蒸气和NaCl协同作用下1Cr11Ni2W2MoV钢的腐蚀[J].金属学报,1998,34(05):483-488. |
| [9] | Wang CJ.;Lee JW.;Twu TH. .Corrosion behaviors of low carbon steel, SUS310 and Fe-Mn-Al alloy with hot-dipped aluminum coatings in NaCl-induced hot corrosion[J].Surface & Coatings Technology,2003(0):37-43. |
| [10] | Wang ChaurJeng;Li ChingChi .Corrosion behaviors of AISI 1025 steels with eledteoles nickel/aluminized coatings in NaCl-induced hot corrosion[J].Surface and Coatings Technology,2004,177-178:37-43. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%