Hot oxidation and corrosion behaviour of boiler steel fabricated by wire arc additive manufacturing

被引：15
作者：
Kannan A.R. [1 ]
Prasad C.D. [2 ]
Rajkumar V. [3 ,5 ]
Shanmugam N.S. [4 ]
Lee W. [1 ]
Yoon J. [1 ,6 ]
机构：
[1] Department of Mechanical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University, 55, Hanyangdaehak-ro, Gyeonggi-do, Ansan
[2] Department of Mechanical Engineering, RV Institute of Technology and Management, Karnataka, Bengaluru
[3] Department of Mechanical Engineering, Coimbatore Institute of Engineering and Technology, Tamil Nadu, Coimbatore
[4] Department of Mechanical Engineering, National Institute of Technology, Tamil Nadu, Tiruchirappalli
[5] Department of Mechanical Engineering, PSG Institute of Technology and Applied Research, Tamil Nadu, Coimbatore
[6] AIDICOME Inc., 55, Hanyangdaehak-ro, Sangnok-gu, Ansan
来源：
Materials Characterization | 2023年 / 203卷
基金：
新加坡国家研究基金会;
关键词：
Hot corrosion; Microstructure; SS308L; Stainless steel; Welding; Wire arc additive manufacturing;
D O I：
10.1016/j.matchar.2023.113113
中图分类号：
学科分类号：
摘要：
Boiler Steels undergo severe degradation in corrosion resistance due to oxide scale formation at elevated temperatures. In this study, the comparative hot oxidation and hot corrosion resistance of wire arc additive manufactured SS 308L (WAAM 308L) was examined in hot air and Na2SO4–60% V2O5 molten salt environments at 700 °C. The corrosion resistance at elevated temperature was analysed using thermo-kinetic curves, corrosion products, and morphology of the oxides. The hot oxidation kinetics revealed that WAAM processed SS 308L specimens has excellent resistance and the weight gain reached 3.10 mg/cm2 with thinner oxide scale formation. Hot corrosion kinetics of WAAM processed SS 308L specimens highlighted the higher weight gain (37.0 mg/cm2) in molten salt environment and is attributed to the acceleration of oxide scale formation by the salts at elevated temperatures. Also, the development of Ni3V2O8 and Fe2O3 along with the depletion of Cr2O3 significantly influenced the corrosion resistance at elevated temperatures. The findings of this study reveal the potential of WAAM to produce customized parts for high-temperature applications. © 2023 Elsevier Inc.
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