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研究论文

电沉积Ni-Mo-P合金镀层在NaCl溶液中的腐蚀特性(英文)

  • 曾跃
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  • 湖南师范大学化学系,天津大学应用化学系

收稿日期: 1998-11-28

  修回日期: 1998-11-28

  网络出版日期: 1998-11-28

Corrosion Characteristics of Electrodeposited Ni Mo P Alloy Immersed in NaCl Solution

  • Zeng Yue Huang Hongxin Xiao Xiaoming Lian Shixun
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  • (Department of Chemistry, Hunan Normal University, Changsha, Hunan, 410006) Yao Suwei Guo Hetong (Department of Applied Chemistry, Tiangjin University, Tianjin, 300072

Received date: 1998-11-28

  Revised date: 1998-11-28

  Online published: 1998-11-28

摘要

用失重法、阳极极化曲线、X光电子能谱(XPS)以及俄歇电子能谱(AES)研究了电沉积NiMoP合金镀层在5%NaCl溶液中的腐蚀特性.非晶态NiMoP合金镀层比晶态NiMoP合金镀层有较低的腐蚀速度.阳极极化曲线表明,NiMoP合金镀层中,镍的摩尔分数为0.719~0.868时,随镀层中磷含量的增加,腐蚀电位正移;而活化区的峰电流随镀层中钼含量的增加而增加.磷含量对活化区的峰电流以及钼含量对腐蚀电位的影响均很小.XPS和AES分析指出,经5%NaCl溶液中浸渍后,NiMoP合金镀层表面形成厚度约为50nm的氧化膜.这层氧化膜主要由Ni2O3,MoO3和PO43-等构成,其在电解质溶液和合金间起着阻挡层的作用.

本文引用格式

曾跃 . 电沉积Ni-Mo-P合金镀层在NaCl溶液中的腐蚀特性(英文)[J]. 电化学, 1998 , 4(4) : 380 -387 . DOI: 10.61558/2993-074X.3145

Abstract

The corrosion characteristics of electrodeposited Ni Mo P alloy immersed in 5wt.% NaCl solution were investigated using immersion, anodic polarization curves, XPS and AES analysis. The corrosion rates of amorphous Ni Mo P alloys are lower than that of crystalline Ni Mo P alloys. Anodic polarization curve experiments show that for the electrodeposited Ni Mo P alloys, the nickel mol fraction of which has in between 0.719 and 0.868, the corrosion potential moves to positive with the increase of P content, and the peak current value of active region increase with the increase of Mo content in alloys, though the effects of P content on the peak current of active region and of Mo content on the corrosion potential are insignificant. XPS and AES analyses indicate that after immersion in 5wt.% NaCl solution, an oxidation film of about 50 nm in thickness is formed on the surface of Ni Mo P alloys. This oxidation film is composed of Ni 2O 3,MoO 3 and PO 3- 4, and acts as a barrier between the alloy and the electrolyte.

参考文献

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