한국표면공학회지 (20권3호 95-105)
Microstructure and Hot Corrosion Resistance of Aluminide and Chromium-Aluminide Coatings for Inconel 600
Inconel 600에 있어서 Al 및 Al-Cr擴酸浸透 被覆處理에 따른 被覆層의 特性과 耐蝕性
정린상;박경채;박수호;
Chung In-Sang;Park, Kyeung-Chae;Park, Soo-Ho;
慶北大學校工科大學金屬工學科;
Dept. of Metall. Engng., Kyungpook National University;
For the purpose of improving the hot corrosion resistance of Ni-base superalloy, Inconel 600, aluminide and chromium-aluminide coatings by pack cementation process were studied. The morphology of these coatings is dependent on the type of process employed. And their overall composition depends on the composition of the base alloy and on the nature of the cement. Therefore the different aluminide and chromium-aluminide coatings obtained on a superalloy do not possess the same resistance to oxidation and hot corrosion. The mechanisms governing the formation of the coatings and the composition of the coating were varied by pack composition and temperature, and cyclic hot corrosion resistance of the auluminide coating formed by one-step process was inferior to that of the coating formed by two-step process. and Cr-Al composite coating showed good resistance for cyclic hot corrosion.
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