引用本文:文陈,郝雪龙,崔庆新,白晶莹,张立功,李思振.Fe2+浓度对2A12铝合金微弧氧化膜性能的影响[J].中国表面工程,2017,30(5):67~73
WEN Chen,HAO Xue-long,CUI Qing-xin,BAI Jing-ying,ZHANG Li-gong,LI Si-Zhen.Effects of Fe2+ Content on Properties of MAO Films on 2A12 Aluminum Alloys[J].China Surface Engineering,2017,30(5):67~73
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Fe2+浓度对2A12铝合金微弧氧化膜性能的影响
文陈1, 郝雪龙2, 崔庆新1, 白晶莹1, 张立功1, 李思振1
1.中国空间技术研究院 北京卫星制造厂, 北京 100094;2.北京有色金属研究总院 国家有色金属及电子材料分析测试中心, 北京 100088
摘要:
为分析掺杂元素对微弧氧化膜热控性能的影响，获得更高太阳吸收比和发射率的热控膜层，采用磷酸盐体系、Fe2+盐添加剂制备了微弧氧化（Micro anodic oxidation，MAO）膜，并研究了不同浓度Fe2+盐添加剂对MAO膜层热控性能的影响；采用扫描电镜观察了MAO膜微观结构，结合EDS、XRD，分析了Fe2+浓度对MAO膜层微观形貌、膜层成分、相组成、耐盐雾腐蚀性的影响规律。结果表明：Fe2+进入了膜层，Fe元素含量随着添加剂中Fe2+浓度升高而增加，太阳吸收比和发射率均先升后降，且在Fe2+浓度为20 g/L时出现峰值0.89和0.83；掺杂Fe2+进入膜层生成Fe3O4，显著提高了MAO膜的热控性能和耐盐雾性能；Fe2+浓度在20 g/L时微弧氧化膜具有优异的热控性能（其太阳吸收比达αS0.89、发射率达εH0.83）和耐盐雾腐蚀性能。
关键词:  微弧氧化  Fe2+浓度  热控性能  盐雾腐蚀
DOI：10.11933/j.issn.1007-9289.20170329003
分类号:
基金项目:国家重点研发计划项目（2017YFB0702100）
Effects of Fe2+ Content on Properties of MAO Films on 2A12 Aluminum Alloys
WEN Chen1, HAO Xue-long2, CUI Qing-xin1, BAI Jing-ying1, ZHANG Li-gong1, LI Si-Zhen1
1.Beijing Spacecrafts, China Academy of Space Technology, Beijing 100094;2.National Center of Analysis and Testing for Nonferrous Metals & Electronic Materials, General Research Institute for Nonferrous Metals, Beijing 100088
Abstract:
In order to obtain a high absorption and high emission thermal control film by making out the effect of doping element on thermal control properties, the micro-arc oxidation (MAO) film was prepared by using a phosphate system and Fe2+ salt additive. The effects of different concentrations of Fe2+ salt additive on the thermal control performance of MAO film was studied. The effects of Fe2+ concentration on the microstructure, membrane composition and salt spray corrosion resistance of MAO were investigated by XRD and EDS, respectively. The results show that Fe2+ enters into the film, and its content increases with the increase of Fe2+ concentration in the additive.The solar absorption ratio and emissivity firstly increase and then descend, and the peak appears at the Fe2+ concentration of 20 g/L, with the values of 0.89 and 0.83, respectively. The addition of Fe2+ leads to form Fe3O4, which significantly increases the salt spray resistance time and thermal control property. When the concentration of Fe2+ is 20 g/L, 2A12 micro-arc oxidation film has the best thermal control properties (αS is 0.89 and εH is 0.83) and corrosion resistance.
Key words:  micro-arc oxidation (MAO)  concentration of Fe2+  thermal control  salt spray corrosion
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