用MgAl层状双氢氧化物层密封阳极氧化镁合金AZ31。

Sealing of anodized magnesium alloy AZ31 with MgAl layered double hydroxides layers.

作者信息

Zhang Gen, Wu Liang, Tang Aitao, Weng Bo, Atrens Andrej, Ma Shida, Liu Lei, Pan Fusheng

机构信息

College of Materials Science and Engineering, Chongqing University Chongqing 400044 China

National Engineering Research Center for Magnesium Alloys, Chongqing University Chongqing 400044 China.

出版信息

RSC Adv. 2018 Jan 9;8(5):2248-2259. doi: 10.1039/c7ra11683g.

DOI:10.1039/c7ra11683g

PMID:35541445

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9077258/

Abstract

In this work, anodized magnesium alloy AZ31 with and without boiling water sealing was pre-prepared, and then MgAl-layered double hydroxide (LDH) films were fabricated on it through hydrothermal chemical conversion of the pre-prepared anodic layer. The morphology, structure, and composition of the films were characterized by XRD, SEM, EDS, FT-IR, XPS and GDOES. It was found that the porosity of the films was reduced after fabrication of the LDHs. The effects of boiling water sealing treatment on the anodized substrate were also discussed. Moreover, the polarization curve, EIS, and immersion tests showed that LDHs fabricated on the anodized substrate with boiling water sealing treatment exhibited a significant long period of protection for the substrate.

摘要

在本研究中，预先制备了经过和未经过沸水封孔处理的阳极氧化镁合金AZ31，然后通过对预先制备的阳极氧化层进行水热化学转化，在其上制备了MgAl层状双氢氧化物（LDH）薄膜。采用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、能谱仪（EDS）、傅里叶变换红外光谱仪（FT-IR）、X射线光电子能谱仪（XPS）和辉光放电发射光谱仪（GDOES）对薄膜的形貌、结构和成分进行了表征。结果发现，制备LDH后薄膜的孔隙率降低。还讨论了沸水封孔处理对阳极氧化基体的影响。此外，极化曲线、电化学阻抗谱（EIS）和浸泡试验表明，在经过沸水封孔处理的阳极氧化基体上制备的LDH对基体具有显著的长期保护作用。