中华医学超声杂志

应用化学 ›› 2009, Vol. 26 ›› Issue (10): 1227-1231.

• 研究论文 • 上一篇    下一篇

二乙基二硫代氨基甲酸钠对黄铜管的缓蚀性能研究

廖强强1,2,李伟1,李义久3,周琪4   

  1. (1.上海大学化工系 上海 201800;2.上海电力学院,上海高校电力腐蚀控制与应用电化学重点实验室 上海 200090;
    同济大学3.化学系;4.环境科学与工程学院 上海)
  • 收稿日期:2008-10-10 修回日期:2009-01-21 出版日期:2009-10-10 发布日期:2009-10-10
  • 通讯作者: 廖强强，男，博士，副教授; E-mail:Liaoqq1971@yahoo.com.cn; 研究方向：金属腐蚀与防护
  • 基金资助:
    上海市重点学科（P1304）资助项目

Electrochemical behaviour of Brass tube by Sodium Diethyldithiocarbamate

 LIAO Qiang-Qiang1,2, LI Wei1, LI Yi-Jiu3, ZHOU Qi4   

  1. (1.Department of Chemical Engineering,Shanghai University,Shanghai 201800;2.Key Laboratory of Shanghai Colleges and Universities for Electric Power Corrosion Control and Applied Electrochemistry,Shanghai College of Electric Power,Shanghai 200090;3.Department of Chemistry;4.College of Environmental Science and Engineering,Tongji University,Shanghai)
  • Received:2008-10-10 Revised:2009-01-21 Published:2009-10-10 Online:2009-10-10

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摘要：

通过失重法、交流阻抗（EIS）以及极化曲线等测试方法，研究了在质量分数为3%NaCl溶液中二乙基二硫代氨基甲酸钠（SDDTC）对黄铜管的缓蚀行为。 失重测试结果表明,SDDTC在质量浓度为120 mg/L时具有最佳缓蚀效果，缓蚀效率达到95%。 交流阻抗的测试结果表明,黄铜电极的极化电阻Rp值最初随着浓度的增加及浸泡时间的延长而增加，在浸泡72 h以及质量浓度达到120 mg/L时达到最大值,之后随着SDDTC浓度的进一步增加和浸泡时间的延长Rp值反而有所下降。 极化曲线测试结果显示,该缓蚀剂对黄铜电极的阳极和阴极行为均具有抑制作用。

关键词: 黄铜，二乙基二硫代氨基甲酸钠，失重，交流阻抗，极化曲线，缓蚀效率

Abstract:

Inhibition of brass corrosion by sodium diethyldithiocarbamate (SDDTC) in 3% NaCl solution was investigated by weight-loss method, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. The Weight-loss results showed that SDDTC had an inhibition efficiency up to 95% in 3% NaCl at a concentration of 120 ppm. The EIS results indicated that the Rp values of brass electrodes initially increased with the SDDTC concentration and immersion time, reached a maximum at 120ppm and 72h. After that, the Rp values decreased only slightly with further increase in SDDTC concentration and immersion time. Potentiodynamic polarization results revealed that the inhibitor had simultaneous inhibitory effects on anodic and cathodic behaviors of brass in 3% NaCl solution.

Key words: brass,sodium diethyldithiocarbamate(SDDTC),mass-loss,electrochemical impedance spectroscopy(EIS),polarization curves,inhibition efficiency

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