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Impressive strides in amelioration of corrosion behavior of Mg-based alloys through the peo process combined with surface laser process: A review

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Journal of Magnesium and Alloys 2023年第12期11卷 4390-4406页

作者： Arash Fattah-alhosseini Razieh Chaharmahali Department of Materials Engineering Bu-Ali Sina UniversityHamedan 65178-38695Iran

The unsatisfactory corrosion properties of Mg-based alloys pose a significant obstacle to their widespread application. Plasma electrolytic oxidation(peo) is a prevalent and effective coating method that produces a ceramic-like oxide coating on the surface of Mg-based alloys,enhancing their resistance to corrosion. Research has demonstrated that peo treatment can substantially improve the corrosion performance of alloys based on magnesium in the short term. In an effort to enhance the corrosion resistance of peo coatings over an extended period of time, researchers have turned their attention to the use of laser processes as both pre-and post-treatments in conjunction with the peo process. Various laser processes, such as laser shock melting(LSM), laser shock adhesion(LSA), laser shock texturing(LST), and laser shock peening(LSP), have been investigated for their potential to improve peo coatings on Mg substrates and their alloys. These laser melting processes can homogenize and alter the microstructure of Mg-based alloys while leaving the bulk material unchanged, thereby modifying the substrate surface. However, the porous and rough structure of peo coatings, with their open and interconnected pore structure, can reduce their long-term corrosion resistance. As such, various laser processes are well-suited for surface modification of these coatings. This study will first examine the peo process and the various types of laser processes used in this process, before investigating the corrosion behavior of peo coatings in conjunction with laser pre-and post-treatment processes.

关键词： Mg and its alloy Laser surface texturing Corrosion behavior peo process

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