植酸pH值对AZ31镁合金水滑石/植酸复合膜的影响

来源期刊:中国有色金属学报2019年第6期

论文作者:雷黎 闫然 陈守刚 刘宝裕 黄晓昕 高春丽

文章页码:1178 - 1187

关键词:镁合金;水滑石/植酸复合膜;耐腐蚀性;成膜机制

Key words:magnesium alloy; LDHs/PA film; corrosion resistance; film forming mechanism

摘    要:针对镁合金表面单一水滑石膜开裂严重的问题,采用植酸对其进行后处理,制备水滑石/植酸复合膜。利用扫描电镜、X射线衍射仪、傅里叶红外光谱仪及电化学实验等分析手段,研究植酸pH值对水滑石/植酸复合膜微观形貌、组织成分以及电化学性能的影响,探讨水滑石/植酸复合膜的成膜机制。结果表明:植酸后处理可以改善膜层裂纹,植酸pH值影响水滑石/植酸复合膜的致密性及化学组成;当植酸溶液的pH值为7时,水滑石/植酸复合膜最致密,膜层耐腐蚀性最优。

Abstract: In view of the serious cracking of the single hydrotalcite film on the surface of magnesium alloy, the hydrotalcite/phytic acid (LDHs/PA) film was prepared by phytic acid post-treatment. The morphology, chemical composition and electrochemical property of the film were studied by means of SEM, XRD, FT-IR and electrochemical experiments. The formation mechanism of the film was discussed. The results show that the phytic acid post-treatment can improve the crack of the LDHs film. The pH value of phytic acid has effects on the compactness and chemical composition of the LDHs/PA film. When the pH value of phytic acid is 7, the LDHs/PA film is the densest and the corrosion resistance is the best.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号