Hot Corrosion Behavior of a Cr-Modified Aluminide Coating on a Ni-Based Superalloy
来源期刊：Acta Metallurgica Sinica2014年第4期
论文作者：Duoli Wu Sumeng Jiang Qixiang Fan Jun Gong Chao Sun
文章页码：627 - 634
摘 要：A Cr-modified aluminide coating is prepared on a Ni-based superalloy using arc ion plating and subsequent pack cementation aluminizing.Hot corrosion behavior of the Cr-modified aluminide coating exposed to molten Na2SO4/K2SO4（3:1） or Na2SO4/NaCl（3:1） salts at 900 °C in static air are evaluated as well as the aluminide coating.The results indicate that compared with the aluminide coating,the anti-corrosion properties of the Cr-modified aluminide coating in the both salts are improved,which should be attributed to the beneficial effect of the Cr in the coating.The corrosion mechanism of the Cr-modified aluminide coating,especially the role of Cr in the mixture salt corrosion,is discussed.
Duoli Wu，Sumeng Jiang，Qixiang Fan，Jun Gong，Chao Sun
State Key Laboratory of Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences
摘 要：A Cr-modified aluminide coating is prepared on a Ni-based superalloy using arc ion plating and subsequent pack cementation aluminizing.Hot corrosion behavior of the Cr-modified aluminide coating exposed to molten Na2SO4/K2SO4（3:1） or Na2SO4/NaCl（3:1） salts at 900 °C in static air are evaluated as well as the aluminide coating.The results indicate that compared with the aluminide coating,the anti-corrosion properties of the Cr-modified aluminide coating in the both salts are improved,which should be attributed to the beneficial effect of the Cr in the coating.The corrosion mechanism of the Cr-modified aluminide coating,especially the role of Cr in the mixture salt corrosion,is discussed.
关键词：
