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| 1 | In-situ observation on filiform corrosion propagation and its dependence on Zr distribution in Mg alloy WE43显示文摘The direct industrial importance of the corrosion resistance in WE43 is best emphasized by its extensive use in the automotive, aerospace and electronic industries where weight reduction is a necessary requirement. In this work, the corrosion especially the filiform corrosion in a 3.5 wt.% Na Cl solution and their dependence on the Zr distribution for WE43 were studied by weight loss tests, hydrogen evolution tests, electrochemical measurements and microscopic analyses. The Zr distribution significantly influenced the initiation and propagation of the filiform corrosion, and accordingly significantly influenced the corrosion rate. WE43 with a cluster Zr distribution displayed filiform corrosion throughout the entire surface with an irregular network distribution of filaments. WE43 with a uniform line Zr distribution exhibited only a few examples of linear filiform corrosion. WE43 with a dispersive Zr distribution exhibited no filiform corrosion. The stability of the corrosion film was responsible for the filiform corrosion. Anodic polarisation promoted the initiation and progression of the filiform corrosion,while cathodic polarisation had an inhibiting effect on the filiform corrosion. The serrated interface of the filiform corrosion increased the contact area between the substrate and the corrosive medium, and hence increased the corrosion rate. | Zhi Chen Huizhong Li Xiaopeng Liang Ming-Chun Zhao Kelong Zhang Andrej Atrens | 2023 | Journal of Magnesium and Alloys2023，11，11： | 1 |
| 2 | 挤压态EW75稀土镁合金在沈阳工业大气环境中的腐蚀行为研究显示文摘将挤压态EW75镁合金长期暴露在沈阳典型工业大气中,采用扫描电镜观察其在大气中暴晒不同周期后的表面和截面微观腐蚀形貌,并采用Raman光谱及EDS能谱分析腐蚀产物化学成分。结果表明,工业大气中的可溶性尘土会在挤压态EW75镁合金表面沉积,形成圆形的腐蚀产物,对下面的镁基体有较好的保护性;由于挤压态EW75镁合金中析出相尺寸小,且与镁基体之间的电位差较小,微电偶作用较弱,发生均匀腐蚀。此外,沈阳的季节变化对镁合金的腐蚀影响很大,与低温、低湿的冬季相比,挤压态EW75镁合金在高温高湿的夏季腐蚀率明显更高。 | 孙硕 代珈铭 宋影伟 艾彩娇 | 2024 | 中国腐蚀与防护学报2024，44，1： | 0 |
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