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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (18): 1981-1986. 上一篇    下一篇

研究论文

模拟水中白铜B30耐蚀性影响因素的光电化学研究

徐群杰*,1, 万宗跃1,2, 印仁和2, 朱律均1,2, 曹为民2, 周国定1, 林昌健3   

  1. (1上海电力学院环境工程系 国家电力公司热力设备腐蚀与防护部级重点实验室 上海 200090)
    (2上海大学理学院化学系 上海 200444)
    (3厦门大学固体表面物理化学国家重点实验室 厦门361005)
  • 投稿日期:2007-01-15 修回日期:2007-04-09 发布日期:2007-09-28
  • 通讯作者: 徐群杰

Photoelectrochemical Study of Influence Factors on Corrosion Resistance of Cupronickel B30 in Simulated Water

XU Qun-Jie*,1; WAN Zong-Yue1,2; YIN Ren-He2; ZHU Lü-Jun1,2; CAO Wei-Min2; ZHOU Guo-Ding1; LIN Chang-Jian3   

  1. (1 Key Laboratory of State Power Corporation of China, Department of Environmental Engineering, Shanghai University of Electric Power, Shanghai 200090)
    (2 Department of Chemistry, Shanghai University, Shanghai 200444)
    (3 State Key Laboratory of Solid Surface Physical Chemistry, Xiamen University, Xiamen 361005)
  • Received:2007-01-15 Revised:2007-04-09 Published:2007-09-28
  • Contact: XU Qun-Jie

PDF

1129

被引次数

45

用动电位伏安法和光电化学方法对模拟水中白铜B30耐蚀性影响因素进行了研究. 白铜B30表面膜显示p-型光响应, 光响应来自电极表面的Cu2O层, 在模拟水溶液中表面膜的半导体性质会发生转变, 由p-型转为n-型; 在不同 Cl－, SO42－浓度的模拟水溶液中, 电位正向扫描时呈现阳极光电流, 电位负向扫描时随着Cl－, SO42－离子浓度的增加, 光响应由p-型向n-型转变, 阳极光电流峰面积与阴极光电流峰面积之比增大, 耐蚀性能降低; 随着温度的升高, 白铜B30的耐蚀性能降低; 在pH＝7～9之间, 其耐蚀性能随着pH的升高而提高, 当pH＞9时, 其耐蚀性能随着pH的升高呈降低趋势.

关键词: 白铜B30, 模拟水, 光电化学, 腐蚀

Influence factors on semiconduction properties of oxide films on a cupronickel electrode in the simulated water was studied by cyclic voltammetry and photocurrent response method. The cupronickel electrode showed p-type photoresponse, which came from Cu2O layer on its surface. The photoresponse changed to n-type in the simulated water. The transition from p-type to n-type might be related to the doping of Cl－ and SO42－ anions into Cu2O film. It did not show n-type photoresponse when the cupronickel electrode was immersed in the simulated water containing some sulfide. It was shown that the degree of corrosion increased with the concentration of these anions and temperature. In addition, as the pH increased between 7 and 9, the corrosion resistance of B30 was enhanced, while it lowered as the pH was beyond 9.

Key words: cupronickel alloy, simulated water, photoelectrochemistry, corrosion