Microstructure and Stress Corrosion Behavior of Cold-Sprayed Al-Based Composite Coatings on Q345R Pressure Vessel SteelMicrostructure and Stress Corrosion Behavior of Cold-Sprayed Al-Based Composite Coatings on Q345R Pressure Vessel SteelQ. Wang, Qian, Y. Wang, Niu, and Wei

被引：0

作者：

Qiang Wang ^{[1
]}

Runling Qian ^{[2
]}

Yonggang Wang ^{[1
]}

Wenjuan Niu ^{[1
]}

Cheng Wei ^{[1
]}

机构：

[1] Xi’an University of Architecture and Technology,School of Metallurgical Engineering

[2] Shaanxi Research Center of Metallurgical Engineering,undefined

来源：

JOM | 2025年 / 77卷 / 5期

关键词：

D O I：

10.1007/s11837-025-07271-9

中图分类号：

学科分类号：

摘要：

Gas/oil storage tanks made of pressure vessel steel are exposed to sever stress corrosion environment. In this study, cold-sprayed Al-Al2O3 composite coatings were prepared on the surface of Q345R steel substrates to improve the stress corrosion performance. The influence of Al2O3 content on microstructure, corrosion resistance, and bonding strength of Al-Al2O3 composite coatings was systematically investigated. The Al2O3 particles were well dispersed in composite coatings, and the porosity of Al-30Al2O3 coating was reduced to 0.6%, attributed to the in situ compaction effect of Al2O3 particles. Electrochemical corrosion testing demonstrated that the corrosion resistance of pure Al and Al-Al2O3 coatings was significantly improved compared with the Q345R substrate. Moreover, the Al-Al2O3 coatings exhibited higher bonding strength than the pure Al coating, with the maximum strength achieved at 30 wt.% Al2O3 content. Stress corrosion tests indicated that the Al-30Al2O3 coating can suppress the formation of detrimental FeS compounds, which effectively prevent hydrogen sulfide corrosion. Compared with the uncoated Q345R steel after stress corrosion, the tensile strength of the Q345R steel with the Al-30Al2O3 coating was increased by 67 MPa. Thus, the Al-30Al2O3 composite coating exhibits an excellent combination of mechanical properties and stress corrosion resistance, providing a solution for the protection of pressure vessel steel.

引用

页码：3576 / 3588

页数：12