Solid/Molten Na2SO4-Induced Hot Corrosion Behaviors of Mar-M247 Alloy with CVD Aluminide Coatings

被引：0

作者：

Hu, Qi ^{[1
]}

Geng, Shujiang ^{[1
]}

Wang, Jinlong ^{[1
]}

Wang, Fuhui ^{[1
]}

Sun, Qingyun ^{[2
]}

Xia, Siyao ^{[2
]}

Wu, Yong ^{[2
]}

机构：

[1] Northeastern Univ, Corros & Protect Ctr, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China

[2] Wuhan Res Inst Mat Protect Co Ltd, CAM, Wuhan 430030, Peoples R China

来源：

HIGH TEMPERATURE CORROSION OF MATERIALS | 2024年 / 101卷 / SUPPL 1期

基金：

国家重点研发计划;

关键词：

Hot corrosion; Na2SO4; Solid/molten; Aluminide coating; CVD; HIGH-TEMPERATURE CORROSION; TURBINE-BLADES; MICROSTRUCTURE; RESISTANCE; MECHANISMS; OXIDATION; PERFORMANCE; DEPOSITION; SULFATE; NA2SO4;

D O I：

10.1007/s11085-024-10315-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Aluminide coatings were prepared by chemical vapor deposition (CVD) method on Ni-based superalloy Mar-M247 to improve the corrosion resistance. The Na2SO4-induced hot corrosion behavior of Mar-M247 with and without aluminide coating was investigated at varying temperatures. The results revealed that the substrate underwent relatively mild corrosion attack at temperatures below the Na2SO4 melting point, but extremely severe corrosion attack above it. The aluminide coating significantly improved the corrosion resistance of the substrate, with the formation of Al2O3 scale during corrosion. The effects of both solid and molten Na2SO4 on hot corrosion resistance of Mar-M247 alloy and its aluminide coating was discussed, as well as the detrimental effect of tungsten on the substrate in 'type I' hot corrosion.

引用

页码：283 / 307

页数：25

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