Comparison of corrosion behaviour of zinc in NaCl and in NaOH solutions. Part I: Corrosion layer characterization
Comparison of corrosion behaviour of zinc in NaCl and in NaOH solutions. Part I: Corrosion layer characterization
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DOI：
10.1016/j.corsci.2010.08.003
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发表时间：
2010-12-01
影响因子：
8.3
通讯作者：
Rauch, J. Y.
中科院分区：
文献类型：
--
作者：
Mouanga, M.;Bercot, P.;Rauch, J. Y.
研究了常温下锌在0.6M氯化钠和0.5M氢氧化钠溶液中形成的腐蚀层。用扫描电子显微镜(SEM)分析了腐蚀层的形貌。用X射线衍射仪(XRD)和X射线光电子能谱(XPS)对锌的腐蚀产物进行了表征。用辉光放电光学发射光谱(GDEOS)研究了腐蚀层厚度的变化。在0.5M氢氧化钠溶液中形成的腐蚀层比在0.6M氯化钠溶液中形成的腐蚀层更致密。在0.6 M的氯化钠溶液中，锌表面生成了中心点为2H(2)O的氢氧化锌(Zn(5)(OH)(8)Cl(2))和中心点为2H(2)O的碳酸锌(ZN(5)(CO(3))(2)(OH)(6))；在0.5 M的NaOH溶液中，锌表面生成了氧化锌(ZnO)、氢氧化锌(Zn(OH)(2))和碳酸锌(Zn(5)(OH)(6)(CO(3))(2)中心点H(2)O)。提出了锌腐蚀产物形成的可能机理。(C)2010爱思唯尔有限公司。保留所有权利。
The corrosion layer formed on zinc sample in 0.6 M NaCl and 0.5 M NaOH solution under ambient conditions has been investigated. The corrosion layer morphology was analyzed using scanning electron microscopy (SEM). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize the corrosion products of zinc. The thickness evolution of the corrosion layer was investigated by glow discharge optical emission spectroscopy (GDEOS). The corrosion layer formed in 0.5 M NaOH solution appeared more compact than that formed in 0.6 M NaCl solution. Zinc hydroxide chloride (Zn(5)(OH)(8)Cl(2)center dot 2H(2)O) and zinc hydroxide carbonate (Zn(5)(CO(3))(2)(OH)(6)) were formed on zinc surface in 0.6 M NaCl solution while in 0.5 M NaOH solution, zinc oxide (ZnO), zinc hydroxide (Zn(OH)(2)) and zinc hydroxide carbonate (Zn(5)(OH)(6)(CO(3))(2)center dot H(2)O) were detected. Probable mechanisms of zinc corrosion products formation are presented. (C) 2010 Elsevier Ltd. All rights reserved.