Insight into the anisotropic electrochemical corrosion behaviors of laser metal deposited Ni-based single crystal superalloy

被引：30

作者：

Han, Sanxuan ^{[1
]}

Zhang, Jie ^{[1
]}

Lei, Xiaowei ^{[1
]}

Yang, Ruining ^{[1
,2
]}

Wang, Nan ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Phys Sci & Technol, Xian 710072, Peoples R China

[2] Guiyang AECC Power Investment Casting Co Ltd, Guiyang 550014, Peoples R China

来源：

CORROSION SCIENCE | 2023年 / 217卷

基金：

中国国家自然科学基金;

关键词：

Ni-based single crystal superalloys; Laser metal deposition; Electrochemical corrosion; Passive film; Crystal orientation; STAINLESS-STEEL;

D O I：

10.1016/j.corsci.2023.111111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aiming to marine environment for Ni-based single crystal superalloy, whether anisotropy affects the electro-chemical corrosion behavior of laser metal deposited component is unclear. This work reveals that the corrosion resistances increase in the order of (001) < (111) < (011), agrees well with the sequence of film thickness. The passive films are mainly composed of W6+, Ta5+, Al3+, and Mo6+ oxides. The optimal performance of (011) surface is attributed to the thickest film and the highest fractions of W6+ and Al3+ oxides. Our results pave the way for the orientation design of laser repaired superalloys to acquire optimal corrosion properties.

引用

页数：12

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