A strategy to overcome the negative effect of Mg treatment on localized corrosion and enhance the performance of high-nitrogen martensitic stainless steel by Mg&Ce composite treatment

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-06-01 Epub Date: 2025-03-11 DOI:10.1016/j.corsci.2025.112852

Peng-Chong Lu , Hao Feng , Hua-Bing Li , Ming-Hong Ling , Hai-Jian Wang , Hong-Chun Zhu , Shu-Cai Zhang , Zhuo-Wen Ni , Zhong-Qiu Liu , Zhou-Hua Jiang

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Abstract

Through electrochemical and mechanical tests, microstructural characterization and thermodynamic assessment, this work demonstrated that magnesium (Mg) treatment enhanced the mechanical properties of high-nitrogen martensitic stainless steel (HNMSS), while reduced its corrosion resistance due to the coupling effects of anodic dissolution and chemical dissolution of MgO, MgS and their composite inclusions. Subsequently, Mg&Ce composite treatment was proposed to comprehensively enhance the corrosion resistance and mechanical properties of HNMSS. After Mg&Ce treatment, the inclusions were modified to Ce₂O₂S, CeN and Mg₃N₂, which all exhibited tendency of chemical dissolution. However, the formation of ammonium following the slight dissolution of CeN and Mg₃N₂ could inhibit the propagation of localized corrosion. Eventually, the advantages of Mg&Ce treatment were discussed, establishing an effective method for producing high-cleanliness and high-performance HNMSS.

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Mg&Ce复合处理克服Mg处理对局部腐蚀的负面影响，提高高氮马氏体不锈钢性能的策略

通过电化学和力学测试、显微组织表征和热力学评估，本研究表明，镁（Mg）处理提高了高氮马氏体不锈钢（HNMSS）的力学性能，但由于MgO、MgS及其复合夹杂物的阳极溶解和化学溶解的耦合作用，降低了其耐蚀性。随后，提出了Mg&；Ce复合处理，以全面提高HNMSS的耐腐蚀性能和力学性能。Mg&；Ce处理后，夹杂物被改性为Ce2O2S、CeN和Mg3N2，均表现出化学溶解的趋势。然而，CeN和Mg3N2轻微溶解后形成的铵可以抑制局部腐蚀的扩展。最后讨论了Mg&；Ce处理的优点，建立了一种制备高清洁度、高性能HNMSS的有效方法。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.