<strong>Mg-Gd-Y-Zn-Mn</strong>合金不同微弧氧化表面<strong>MgAlLa</strong>层状双羟基金属氧化物复合涂层的性能研究

doi:10.11902/1005.4537.2023.153

中国腐蚀与防护学报

2023, Vol. 43

Issue (4): 693-703 CSTR: 32134.14.1005.4537.2023.153 DOI: 10.11902/1005.4537.2023.153

中国腐蚀与防护学会杰出青年成就奖论文专栏

本期目录 | 过刊浏览

Mg-Gd-Y-Zn-Mn合金不同微弧氧化表面MgAlLa层状双羟基金属氧化物复合涂层的性能研究

吴嘉豪¹, 吴量¹^,²^,³(

), 姚文辉¹^,²^,³, 袁媛¹^,²^,³, 谢治辉⁴, 王敬丰¹^,²^,³, 潘复生¹^,²^,³

^1.重庆大学材料科学与工程学院国家镁合金工程技术研究中心重庆 400044
^2.重庆大学高端装备铸造技术全国重点实验室重庆 400044
^3.重庆大学机械传动国家重点实验室重庆 400044
^4.西华师范大学化学化工学院化学合成与污染控制四川省重点实验室南充 637002

Properties of Layered Dihydroxyl Metal (MgAlLa) Oxide Composite Coatings on Different Micro-arc Oxidation Surfaces of Mg-Gd-Y-Zn-Mn Alloy

WU Jiahao¹, WU Liang¹^,²^,³(

), YAO Wenhui¹^,²^,³, YUAN Yuan¹^,²^,³, XIE Zhihui⁴, WANG Jingfeng¹^,²^,³, PAN Fusheng¹^,²^,³

^1.National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
^2.National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China
^3.State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
^4.Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China

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摘要:

采用铝酸盐/硅酸盐体系 (AS)、铝酸盐/磷酸盐体系 (AP)、硅酸盐/磷酸盐体系 (SP) 和铝酸盐/磷酸盐/硅酸盐体系 (APS) 的微弧氧化电解液对Mg-Gd-Y-Zn-Mn合金进行微弧氧化 (MAO)，并在其表面再进行原位生长MgAlLa层状双羟基金属氧化物 (MgAlLa-LDHs) 得到复合涂层。研究了不同MAO涂层对MgAlLa-LDHs涂层性能的影响，表征了涂层的形貌、结构及成分，并评估了其耐腐蚀性能。结果表明，不同MAO涂层表面生长的MgAlLa-LDHs膜形貌和结构存在明显的差异。此外，APS电解液制备的复合涂层表现出优异的耐腐蚀性能，其腐蚀电流密度为9.14×10^-9 A·cm^-2，相较镁合金基体提升了约4个数量级。

关键词 ：微弧氧化, 层状双羟基金属氧化物, 电解液, 镁合金, 耐蚀性

Abstract：

Micro-arc oxidation (MAO) surfaces were prepared on a Mg-Gd-Y-Zn-Mn alloy in four different electrolytes, namely aluminate/silicate (AS), aluminate/phosphate (AP), silicate/phosphate (SP) and aluminate/phosphate/silicate (APS), afterwards, on which films of layered dihydroxyl metal (MgAlLa) oxides (MgAlLa-LDHs) were in-situ grown to acquire the composite coating of MgAlLa-LDHs/MAOs. Then the effect of different MAO surfaces on the properties of the MgAlLa-LDHs/MAOs composite coatings were studied by means of field emission scanning electron microscopy (FE-SEM), X-ray diffractometer (XRD), energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS), as well as measurements of potentiodynamic polarization, electrochemical impedance and hydrogen evolution etc. in terms of their morphology, microstructure, composition and corrosion behavior in 3.5%NaCl solution. The results show that the different MAO coatings present differences in morphology, phase constituents, number of phases, element distribution and pore size, which affect the in-situ growth of the subsequent MgAlLa-LDHs nanosheets, so that the shape, size and crystallinity of the MgAlLa-LDHs nanosheets are obviously different. In addition, the composite coatings of MgAlLa-LDHs/APS-MAO show excellent corrosion resistance with a corrosion current density 9.14×10^-9 A·cm^-2, which is about four orders of magnitude lower than that of the bare Mg-alloy substrate.

Key words： micro-arc oxidation layered double hydroxyl metal oxide electrolyte Mg-alloy corrosion resistance

收稿日期: 2023-05-10 32134.14.1005.4537.2023.153

ZTFLH:

TG172

基金资助:国家自然科学基金(51971040);国家自然科学基金(52171101)

通讯作者: 吴量，E-mail: wuliang@cqu.edu.cn，研究方向为镁等轻合金腐蚀与防护

Corresponding author: WU Liang，E-mail: wuliang@cqu.edu.cn

作者简介: 吴嘉豪，男，1995年生，博士生
吴量，1985 年出生，2015 年毕业于北京航空航天大学，获博士学位。现就职于重庆大学，教授，博士生导师。 2020 年德国Helmholtz-Zentrum Hereon 研究所访问学者。吴量教授主要研究方向为镁合金防护涂层和镁空气电池阳极材料。针对镁合金腐蚀与防护的难题，揭示了镁合金阳极/微弧氧化膜表面“类水滑石”膜层的生长及自修复机制；协同设计及调控镁等轻合金涂层的多功能特性，阐释了协同防护机制；揭示了微观组织对镁阳极材料的腐蚀和放电性能的影响规律，开发了高性能MgSnY材料。部分成果在航天五院等单位实现了成果转化。先后主持国家自然科学基金项目3 项、国家军工项目1 项、国际合作项目1 项、省部级及企业项目9 项。以第一/通讯作者在Corros. Sci.、Carbon 等期刊发表SCI 论文共67 篇，ESI 高被引论文5 篇。英文专著1 章，申请专利17 项 (授权5 项)，作大会/特邀报告共18 次。获国际热处理及表面工程联合会汤姆贝尔奖， 2021、 2022 年国际镁科学技术奖，2017中国材料研究学会一等奖，入选“ 2022年全球前2%顶尖科学家”。2023年获得中国腐蚀与防护学会杰出青年成就奖。

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引用本文:

吴嘉豪, 吴量, 姚文辉, 袁媛, 谢治辉, 王敬丰, 潘复生. Mg-Gd-Y-Zn-Mn合金不同微弧氧化表面MgAlLa层状双羟基金属氧化物复合涂层的性能研究[J]. 中国腐蚀与防护学报, 2023, 43(4): 693-703.
WU Jiahao, WU Liang, YAO Wenhui, YUAN Yuan, XIE Zhihui, WANG Jingfeng, PAN Fusheng. Properties of Layered Dihydroxyl Metal (MgAlLa) Oxide Composite Coatings on Different Micro-arc Oxidation Surfaces of Mg-Gd-Y-Zn-Mn Alloy. Journal of Chinese Society for Corrosion and protection, 2023, 43(4): 693-703.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2023.153 或 https://www.jcscp.org/CN/Y2023/V43/I4/693

表1 不同微弧氧化电解液具体成分 (g/L)

图1 复合涂层制备流程图

图2 不同MAO涂层及对应的MAO/MgAlLa-LDHs复合涂层的XRD谱

图3 不同MAO涂层及对应的MAO/MgAlLa-LDHs复合涂层的FT-IR光谱

图4 不同涂层的表面SEM形貌

表2 MAO和对应的MAO/LDHs复合涂层的EDS分析结果 (atomic fraction / %)

图5 不同MAO/LDHs复合涂层的XPS谱

图6 在3.5% NaCl溶液中测量的镁合金基体、MAO涂层和MAO/LDHs复合涂层的动电位极化曲线

表3 图6中动电位极化曲线的Ecorr和Icorr的拟合计算结果

图7 不同涂层在3.5% NaCl溶液中测得的Bode图

图8 用于拟合EIS数据的等效电路

表4 图7中EIS数据的等效电路拟合结果

图9 不同涂层在3.5% NaCl溶液中浸泡的析氢数据

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