HOT CORROSION BEHAVIOR OF K38G ALLOY AND ITS SPUTTERED NANOCRYSTALLINE COATING BY PRE-DEPOSITED SULFATE AT 900℃
来源期刊：Acta Metallurgica Sinica2002年第1期
论文作者：S.L.Zhu W.T.Wu Fuhui WANG S.J.Geng
Key words：K38G; sputtered nanocrystalline coating; hot corrosion;
Abstract: The sputtered nanocrystalline coating of K38G alloy was obtained by magnetron sput-tering. The hot corrosion behaviors of cast K38G alloy and its sputtered nanocrys-talline coating by pre-deposited 75wt%Na2SO4+25wt%K2SO4 at 900℃ were studied.The results indicated the occurrence of internal sulfidation in the cast K38G alloy withpre-deposited sulfattes of 0.8 and 3.0mg/cm2. However, the internal sulfidation wasnot observed in the coating with pre-deposited 0. 8mg/cm2 sulfate. The hot corrosionresistance of K38G alloy was clearly enhanced through nanocrystallinzation, althoughthe internal sulfides were still formed for the coating with sulfate deposit of 3mg/cm2.The relevant hot corrosion mechanism was also discussed.
S.L.Zhu1，W.T.Wu1，Fuhui WANG1，S.J.Geng1
(1.State Key Laboratory for Corrosion and Protection, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China)
Abstract:The sputtered nanocrystalline coating of K38G alloy was obtained by magnetron sput-tering. The hot corrosion behaviors of cast K38G alloy and its sputtered nanocrys-talline coating by pre-deposited 75wt%Na2SO4+25wt%K2SO4 at 900℃ were studied.The results indicated the occurrence of internal sulfidation in the cast K38G alloy withpre-deposited sulfattes of 0.8 and 3.0mg/cm2. However, the internal sulfidation wasnot observed in the coating with pre-deposited 0. 8mg/cm2 sulfate. The hot corrosionresistance of K38G alloy was clearly enhanced through nanocrystallinzation, althoughthe internal sulfides were still formed for the coating with sulfate deposit of 3mg/cm2.The relevant hot corrosion mechanism was also discussed.
Key words:K38G; sputtered nanocrystalline coating; hot corrosion;
【全文内容正在添加中】
