MB31镁合金表面化学还原沉积铁膜及其耐蚀性能
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摘要
为了提高镁合金的耐腐蚀性能,在MB31镁合金表面进行不同浓度硫酸亚铁化学还原沉积铁后,再进行不同温度的溶剂热处理。采用现代表面分析技术对不同硫酸亚铁浓度制备的铁膜及不同温度溶剂热处理后的铁膜进行了表征,找出了沉积和热处理最优方案。结果表明:对MB31镁合金表面化学还原沉积铁及适当温度溶剂热处理可以得到致密均匀的铁膜,使之耐腐蚀性能显著提升,最佳硫酸亚铁浓度为75 g/L,最佳溶剂处理温度为130℃。
In order to improve the corrosion resistance of magnesium alloys,the method of reducing iron deposition on MB31 magnesium alloys was adopted and then hydrothermal post-treatment was applied. The reduction layer and the hydrothermal layer prepared under different conditions were analyzed and characterized to find the optimal solution. The results showed that a dense and uniform film layer could be obtained by a composite technique of reduction deposition and hydrothermal treatment,and the corrosion resistance of the magnesium alloy was significantly improved.The optimized content of ferrous sulfate was 75 g/L and the optimized treatment temperature was 130 ℃.
In order to improve the corrosion resistance of magnesium alloys,the method of reducing iron deposition on MB31 magnesium alloys was adopted and then hydrothermal post-treatment was applied. The reduction layer and the hydrothermal layer prepared under different conditions were analyzed and characterized to find the optimal solution. The results showed that a dense and uniform film layer could be obtained by a composite technique of reduction deposition and hydrothermal treatment,and the corrosion resistance of the magnesium alloy was significantly improved.The optimized content of ferrous sulfate was 75 g/L and the optimized treatment temperature was 130 ℃.
引文
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[3]郭兴伍,郭嘉成,章志铖,等.镁合金材料表面处理技术研究新动态[J].表面技术,2017,46(3):53-65.
[4]杨黎晖,李峻青,姜巍巍,等.镁合金表面处理技术的研究进展[J].中国腐蚀与防护学报,2008(5):316-320.
[5]李梁梁.镁合金生物陶瓷涂层制备及耐蚀性能研究[D].哈尔滨:哈尔滨工业大学,2010:11-16.
[6]张满意,郭兴伍,杨海燕,等.镁合金水热法表面处理[J].材料保护,2010,43(7):14-17.
[7]夏琦兴,张亚军,贾方舟,等.镁合金微弧氧化膜水热处理后的耐蚀性能[J].材料保护,2013,46(5):1-4.
[8]崔彤,管仁国.电沉积制备镁合金HA涂层的组织及其可降解性能[J].材料热处理学报,2011,32(9):146-150.
[9] GUAN R G,JOHNSON I,CUI T,et al. Electrodeposition of hydroxyapatite coating on Mg-4. 0Zn-1. 0Ca-0. 6Zr alloy and in vitro evaluation of degradation,hemolysis,and cytotoxicity[J]. J Biomed Mater Res Part A,2012,100A(4):999-1 015.
[10]黄晶晶,任伊斌,张炳春,等.可降解镁植入材料表面涂层的制备及其性能[J].中国有色金属学报,2007,17(9):1 465-1 469.
[11]张兴凯,韩伟,郑玉峰,等.纯镁材表面化学镀铁[J].材料保护,2014,47(4):5-7.
[12] YAO Z,XIA Q,CHANG L,et al. Structure and properties of compound coatings on Mg alloys by micro-arc oxidation/hydrothermal treatment[J]. Journal of Alloys&Compounds,2015,633:435-442.