聚丙烯酸添加剂对镁合金阳极氧化膜性能的影响

付广艳, 陈兆苏, 任雷, 刘华成

doi:10.16577/j.issn.1001-1560.2022.0254

材料保护 >

2022 , Vol. 55 >Issue 9: 109 - 113

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0254

工艺探讨

聚丙烯酸添加剂对镁合金阳极氧化膜性能的影响

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(沈阳化工大学机械与动力工程学院，辽宁沈阳 110142)

陈兆苏(1996-)，硕士研究生，研究方向为镁合金的腐蚀与防护，电话：18852142898，E - mail：1837270326@qq.com

收稿日期: 2022-03-21

修回日期: 2022-04-29

录用日期: 2022-05-17

网络出版日期: 2023-12-23

基金资助

辽宁省教育厅科学研究项目(LJ2020015)资助

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Effect of Polyacrylic Acid Additives on Anodic Oxidation Film on Magnesium Alloy

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(School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China)

Received date: 2022-03-21

Revised date: 2022-04-29

Accepted date: 2022-05-17

Online published: 2023-12-23

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摘要

为了进一步改善镁合金阳极氧化膜的耐腐蚀性能，向以氢氧化钠(NaOH)、硅酸钠(Na2SiO3)、对苯二甲酸(PTA)为主要成分的基础电解液中添加聚丙烯酸(PAA)，在AZ91D镁合金表面制备阳极氧化膜。采用光学显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)及电化学分析仪，分析了聚丙烯酸对镁合金阳极氧化膜的形貌、相组成及耐腐蚀性能的影响。结果表明：镁合金阳极氧化过程中，向电解液中添加聚丙烯酸能够提升氧化电压，抑制弧光放电，减少膜层微孔数，提升膜层致密度和厚度，影响膜层的相组成，进而提高膜层耐腐蚀性能。

关键词： 镁合金; 阳极氧化; 聚丙烯酸; 耐腐蚀性能

本文引用格式

付广艳, 陈兆苏, 任雷, 刘华成 . 聚丙烯酸添加剂对镁合金阳极氧化膜性能的影响[J]. 材料保护, 2022 , 55(9) : 109 -113 . DOI: 10.16577/j.issn.1001-1560.2022.0254

Abstract

In order to further improve the corrosion resistance of the anodic oxidation film on magnesium alloy, polyacrylic acid (PAA) was added into the base electrolyte containing sodium hydroxide (NaOH), sodium silicate (Na2SiO3) and terephthalic acid (PTA) as the main components to prepare anodic oxidation film on the surface of AZ91D magnesium alloy. The effects of polyacrylic acid on the morphology, phase composition and corrosion resistance of the anodic oxidation film on magnesium alloy were analyzed by optical microscope, scanning electron microscope (SEM), X - ray diffraction (XRD) and electrochemical analyzer. Results showed that adding polyacrylic acid into the electrolyte during the anodic oxidation of magnesium alloy could increase the oxidation voltage, inhibit arc discharge, reduce the number of micropores on the film, increase the density and thickness of the film, affect the phase composition of the film, and therefore improve the film’s corrosion resistance.

Key words： magnesium alloy; anodic oxidation; PAA; corrosion resistance

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