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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 | 碱热处理对搅拌摩擦加工AZ31镁合金耐腐蚀性能的影响显示文摘对AZ31镁合金进行搅拌摩擦加工(Friction stir processing,FSP),并对母材(Basal material,BM)和FSP试样进行碱热处理(Alkali heat treatment,AHT),研究了AHT对搅拌摩擦加工后AZ31镁合金微观组织和耐腐蚀性能的影响。结果表明,FSP可以显著细化晶粒,平均晶粒尺寸由BM的12.8μm细化至FSP后的3.1μm,高角度晶界比例从BM的75.9%降低至FSP后的45.3%,晶界亚结构增多。AHT使材料表面形成致密的MgO和Al_(2)O_(3)混合涂层,有效地提高了AZ31镁合金的耐浸泡腐蚀性能。 | 陈善勇 王快社 乔柯 王文 | 2022 | 金属热处理2022，47，3： | 0 |
| 3 | 使用可降解金属材料制备定向骨再生膜的可行性与挑战显示文摘定向骨再生手术是一种用于增加牙槽骨体积的治疗手段.目前,商用的不吸收薄膜(钛膜等)需要二次手术去除,而可吸收薄膜(胶原膜等),由于强度较低,在覆盖大部分病变骨骼时可能会失效.理想的定向骨再生薄膜仍处于发展中.近年来,生物可降解金属被认为是潜在的骨再生薄膜候选材料.因此,本文主要从力学和生物学角度评估了可降解金属作为定向骨再生薄膜的可行性.结果表明,可降解金属具有良好的生物相容性、足够的机械强度、可控的降解速率、良好的成骨性能、广谱抗菌能力和较好的创面愈合能力等优点,能够被用于制备定向骨再生薄膜.然而,对于镁合金来说,其较快的降解速率、析氢行为和应力腐蚀现象制约了其应用.对于锌合金而言,其降解速率适中且无氢气产生,似乎具有更好的应用前景.目前,可降解金属的发展已经为其在口腔临床中的应用奠定了一定的基础. | 陈凯 赵莉 孙洁 顾雪楠 黄晨阳 苏皓然 樊瑜波 | 2022 | Science China Materials2022，65，10： | 0 |
| 4 | Study of galvanic corrosion and mechanical joint properties of AZ31B and carbon-fiber–reinforced polymer joined by friction self-piercing riveting显示文摘A new testing methodology was developed to quantitively study galvanic corrosion of AZ31B and thermoset carbon-fiber–reinforced polymer spot-joined by a friction self-piercing riveting process.Pre-defined areas of AZ31B in the joint were exposed in 0.1 M NaCl solution over time.Massive galvanic corrosion of AZ31B was observed as exposure time increased.The measured volume loss was converted into corrosion current that was at least 48 times greater than the corrosion current of AZ31B without galvanic coupling.Ninety percent of the mechanical joint integrity was retained for corroded F-SPR joints to 200 h and then decreased because of the massive volume loss of AZ31B。 | Yong Chae Lim Jiheon Jun Donovan N.Leonard Yuan Li Jian Chen Michael P.Brady Zhili Feng | 2022 | Journal of Magnesium and Alloys2022，10，2： | 0 |
| 5 | 电解液pH值对镁合金表面灌注液体型光滑多孔表面耐腐蚀性能的影响显示文摘在AZ31镁合金表面制备灌注液体型光滑多孔表面(SLIPS),从而为镁合金提供腐蚀防护。将粗糙多孔的层状双金属氢氧化物(LDH)作为纳米容器,用以盛放液体润滑液。通过调节电解液的pH值,获得用于构筑SLIPS的最佳LDH膜层。研究不同pH值对SLIPS表面形貌、表面润湿性和电化学行为的影响规律。结果表明,当pH值为10.5时,所制备的MgAl-LDH膜层厚度最大,为3.51μm,其可盛放最多的硅油,质量高达0.22mg/mm^(2),使得该MgAl-LDH膜层所构筑的SLIPS可为镁合金提供最优的腐蚀防护性能,腐蚀电流密度最低,为3.72×10^(-9)A/cm^(2)。另一方面,与超疏水表面相比,无论在电化学测试还是在长期浸泡试验中,SLIPS均可为AZ31镁合金基体提供更好的腐蚀防护。镁合金耐腐蚀性能的提高将进一步促进其在实践中的广泛应用。 | 姚文辉 詹国祥 陈勇花 秦洁 吴量 陈燕宁 吴嘉豪 蒋斌 Andrej ATRENS 潘复生 | 2023 | Transactions of Nonferrous Metals Society of China2023，33，11： | 0 |
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