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AZ31鎂合金釹基轉(zhuǎn)化膜研究
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重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué)

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國家重點基礎(chǔ)研究發(fā)展計劃（973計劃）


Investigation of neodymium-based conversion coating on AZ31 magnesium alloy
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Chongqing University,Chongqing University,Chongqing University,Chongqing University,Chongqing University,Chongqing University

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    摘要:

    通過化學(xué)轉(zhuǎn)化成膜在AZ31鎂合金表面制備了釹基轉(zhuǎn)化膜。利用稱重實驗和OCP測試研究了釹基轉(zhuǎn)化膜的成膜過程，利用SEM，EDS和XPS分別研究了膜層形貌，微觀結(jié)構(gòu)和組成成分。研究了空白樣品與鍍膜樣品在3.5 wt.% NaCl 溶液中浸泡不同時間后樣品表面形貌和成分，結(jié)果表明釹基轉(zhuǎn)化膜可以有效的降低AZ31鎂合金在NaCl溶液中的腐蝕速率。利用XRD和電化學(xué)測試研究了經(jīng)過后處理以后的釹基轉(zhuǎn)化膜的成分和耐蝕性能，結(jié)果說明后處理可以進(jìn)一步改善釹基轉(zhuǎn)化膜的腐蝕性能。

    Abstract:

    The neodymium –based (Nd-based) conversion coating was obtained on the surface of AZ31 magnesium alloy. The formation process of Nd-based conversion coating was examined by weighting experiment and open cruit potential (OCP) test. The coating morphology, micro-structure and composition were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy(XPS) and X-ray diffraction (XRD)，respectively. The variation of morphology between bare sample and coated sample immersed in 3.5 wt.% NaCl aqueous solution was investigated, the results showed that the Nd-based conversion coating can effectively reduce the corrosion speed in 3.5 wt.% NaCl aqueous solution. The composition and corrosion resistance of post-treatment on Nd-based conversion coating were measured by XRD and electrochemical experiments. The post-treatment can perfectly improve the corrosion resistance of the Nd-based conversion coating.

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趙丁藏,張丁非,劉渝萍,胡光山,溝引寧,潘復(fù)生. AZ31鎂合金釹基轉(zhuǎn)化膜研究[J].稀有金屬材料與工程,2017,46(2):289~295.[zhaodingzang, zhangdingfei, liuyuping, huguangshan, gouyinning, panfusheng. Investigation of neodymium-based conversion coating on AZ31 magnesium alloy[J]. Rare Metal Materials and Engineering,2017,46(2):289~295.]
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  • 收稿日期:2014-10-26
  • 最后修改日期:2014-11-16
  • 錄用日期:2015-02-06
  • 在線發(fā)布日期: 2017-04-10
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