Microstructure and Corrosion Resistance of Magnetron Sputtering Aluminum Film on Magnesium Alloy Surface Treated by High Energy Shot Peening
摘 要
对AZ91D镁合金基体表面进行不同时间(0,20,30,40 min)高能喷丸(HESP)处理,再采用磁控溅射技术在HESP基体表面沉积铝膜,研究了铝膜的微观形貌与耐腐蚀性能。结果表明:HESP基体表面铝膜的表面组织均匀、致密,铝膜较厚,且随着HESP处理时间的延长,组织更加细小、均匀,铝膜厚度增大;经40 min HESP处理后,铝膜与基体之间存在明显的过渡层,二者的结合力为16 N,是未经HESP处理的3.2倍;与未经HESP处理的相比,HESP基体表面铝膜在NaCl溶液中的自腐蚀电流密度与在盐雾中腐蚀24 h后形成的腐蚀坑深度均较小,且随着HESP处理时间的延长,自腐蚀电流密度与腐蚀坑深度均减小,铝膜的耐电化学和耐盐雾腐蚀性能显著提高。
Abstract
AZ91D magnesium alloy substrate surface was treated by high energy shot peening (HESP) for different times (0, 20,30,40 min), and then aluminium film was plated on the HESP substrate surface by magnetron sputtering technique. The microstructure and corrosion resistance of the aluminium film were studied. The results show that the surface structure of the aluminium film on the HESP substrate surface was uniform and dense, and the film was relatively thick; with increasing HESP time, the structure was finer and more uniform, and the film was thicker. After HESP for 40 min, there was a significant transition layer between aluminium film and substrate, and the bonding force was 16 N, which was 3.2 times that without HESP. Compared with those without HESP, the free corrosion current density of the aluminium film on the HESP substrate surface in NaCl solution and the etch pit depth formed in salt spray for 24 h were relatively small. With increasing HESP time, the free corrosion current density and the etch pit depth both decreased, indicating that the electrochemical and salt spray corrosion resistance of the aluminium film were significantly improved.
中图分类号 TG178 DOI 10.11973/jxgccl202005014
所属栏目 专题报道(金属材料表面处理)
基金项目 教育部科技攻关重点项目(211178);榆林市科学与科技局项目(2014cxy-05)
收稿日期 2019/6/18
修改稿日期 2020/3/20
网络出版日期
作者单位点击查看
备注张聪惠(1974-),女,陕西西安人,教授,博士
引用该论文: ZHANG Conghui,LIU Ying,ZHAO Xu,ZENG Xiangkang,WANG Jing. Microstructure and Corrosion Resistance of Magnetron Sputtering Aluminum Film on Magnesium Alloy Surface Treated by High Energy Shot Peening[J]. Materials for mechancial engineering, 2020, 44(5): 72~76
张聪惠,刘颖,赵旭,曾祥康,王婧. 高能喷丸镁合金表面磁控溅射铝膜的微观结构和耐腐蚀性能[J]. 机械工程材料, 2020, 44(5): 72~76
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参考文献
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【3】KEMPSTER A. Recent developments in aluminium diffusion[J]. Anti-Corrosion Methods and Materials, 1998, 45(2):81-83.
【4】BAHADUR A, SHARMA T L, PARIDA N, et al. Structure-property correlation in Al-diffusion coated steels[J]. Journal of Materials Science, 1993, 28(19):5375-5381.
【5】孙希泰. 材料表面强化技术[M].北京:化学工业出版社,2005:121-123.
【6】余东海,王成勇,成晓玲,等. 磁控溅射镀膜技术的发展[J].真空,2009,46(2):19-25.
【7】王雪敏, 曾小勤, 吴国松, 等. 磁控溅射在镁合金表面处理中的应用[J]. 铸造技术, 2006, 27(4):412-415.
【8】王振林,杨惠,杨栋华,等. 镁合金磁控溅射镀铝耐蚀防护层研究[J].中国机械工程,2008,19(8):993-997.
【9】韦春贝,代明江,高阳,等. AZ91D镁合金磁控溅射镀铝膜及其化学转化后的耐蚀性[J].电镀与涂饰,2012,31(4):30-33.
【10】范多旺, 令晓明, 范多进, 等. 利用真空复合镀膜处理镁合金表面的方法与装置:200610104527.4[P]. 2007-03-07.
【11】张聪惠,高鹏,王耀勉,等.高能喷丸对TA2表面TiN薄膜生长和力学性能的影响[J].稀有金属,2018,42(8):841-849.
【12】YANG M B, PAN F S, CHENG R J, et al. Comparison about effects of Sb, Sn and Sr on as-cast microstructure and mechanical properties of AZ61-0.7Si magnesium alloy[J]. Materials Science & Engineering:A, 2012, 489(1):413-418.
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