任鑫.渗铝改性离子镀NiCrAIY涂层的高温热腐蚀行为[J].表面技术,2008,37(4):1-3.
REN Xin.Hot Corrosion Behavior of an Ion Plating NiCrAIY Coating with Alununizing[J].Surface Technology,2008,37(4):1-3
渗铝改性离子镀NiCrAIY涂层的高温热腐蚀行为
Hot Corrosion Behavior of an Ion Plating NiCrAIY Coating with Alununizing
投稿时间:2008-02-25  修订日期:2008-08-10
DOI:
中文关键词:  渗铝  离子镀  热腐蚀  NiCrAIY
英文关键词:Aluminizing  Ion plating  Hot corrosion  NiCAIY
基金项目:辽宁省教育厅资助项目( 2005196)
作者单位
任鑫 辽宁工程技术大学材料科学与工程系,辽宁阜新123000 
AuthorInstitution
REN Xin Department of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China 
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中文摘要:
      为了进一步改善离子镀NiCrAIY涂层的抗热腐蚀性能,采用粉末包埋法在离子镀NiCrAIY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 +75 010 Na2 S04熔盐中850℃热腐蚀40h时,未渗铝的NiCrAIY涂层生成的是外层以Cr2 03为主的氧化膜,渗铝后的NiCrAIY涂层仅生成一层Al2 03膜;未渗铝的NiCrAIY涂层在腐蚀50h后失去保护作用,而渗铝涂层在腐蚀lOOh后表面仍形成以Al2 03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。
英文摘要:
      A NiCrAIY coating was deposited on a Ni-based superalloy by ion plating. Post-aluminizing was performed on the coating to improve the corresponding high-temperature properties. Hot corrosion behaviors in the presence of 750/o Na2S04 +250/o NaCl film at 850℃ of the coatings with and without aluminizing have been investigated. In 250/o NaCl +750/o Na2S04 molten salt at 850℃ , Cr203 scale formed on NiCrAIY coating at 40h, while at the same time a single layer of a-Al203 scale formed on the coating with post-aluminizing. The main oxide of Al203 remained on the surface of the coating with post-aluminizing, which obviously increased the resistance to hot corrosion of the coating.
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