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Mg65Cu25Gd10非晶合金的腐蝕行為
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國家863項(xiàng)目(2003AA305071)


Corrosion Behavior of the Bulk Amorphous Mg65Cu25Gd10 Alloy
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    采用電化學(xué)方法研究了塊體Mg65Cu25Gd10非晶合金在0.01 mol/L, pH=13的NaCl溶液及0.1 mol/L, pH=13的NaOH溶液中的腐蝕行為。在2種電解質(zhì)溶液中，非晶合金樣品的極化曲線具有明顯的鈍化區(qū)和較低的鈍化電流密度。浸蝕樣品的表面形貌和腐蝕產(chǎn)物采用SEM和EDS來表征。恒電位鈍化后樣品表面層化學(xué)信息運(yùn)用DP-XPS來考察。結(jié)果表明，樣品在NaOH溶液中形成致密少孔的鈍化膜，而在含Cl離子的溶液中，樣品表面鈍化膜疏松且多孔，導(dǎo)致合金在含Cl離子的溶液中具有較低的耐蝕性。

    Abstract:

    The corrosion behavior of bulk amorphous Mg65Cu25Gd10 alloy was studied by electrochemical measurement. The potentiodynamic polarization tests were carried out in 0.01 mol/L NaCl solution and 0.1 mol/L NaOH solution with pH=13. The amorphous Mg65Cu25Gd10 alloy was spontaneously passivated at a significantly low passivation current density in the two kinds of solutions. The surface morphology and corrosive products of samples after dipping tests were characterized by scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS). The potentiostatically formed surface layers on Mg65Cu25Gd10 were investigated with a depth profile X-ray photoelectron spectroscopy (DP-XPS). The results show that the potentiostatically formed surface layer in NaOH solution is more compact and less porous than that in NaCl solution, indicating that the Mg65Cu25Gd10 alloy has a better corrosion resistance in the solution without Cl－.

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李國強(qiáng),鄭立靜,李煥喜. Mg65Cu25Gd10非晶合金的腐蝕行為[J].稀有金屬材料與工程,2009,38(1):110~114.[Li Guoqiang, Zheng Lijing, Li Huanxi. Corrosion Behavior of the Bulk Amorphous Mg65Cu25Gd10 Alloy[J]. Rare Metal Materials and Engineering,2009,38(1):110~114.]
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  • 收稿日期:2008-01-22
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