Electrochemical Study of Cyproconazole as a Novel Corrosion Inhibitor for Copper in Acidic Solution
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- 作者：Zhihua Tao ; Wei He ; Shouxu Wang ; Guoyun Zhou
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2013
- 出版时间：December 18, 2013
- 年：2013
- 卷：52
- 期：50
- 页码：17891-17899
- 全文大小：796K
- 年卷期：v.52,no.50(December 18, 2013)
- ISSN：1520-5045
文摘
Cyproconazole (CPA) is an azole fungicide and easily biodegradable so that it is an alternative corrosion inhibitor in the water treatment and industrial pickling process. Effects of CPA on the corrosion resistance of copper in 0.5 M H2SO4 solutions were evaluated via electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and scanning electron microscopy (SEM). Both thermodynamic and adsorption models were calculated and discussed. The results showed that the adsorption of CPA on the copper surface obeys the Dhar鈥揊lory鈥揌uggins and Bockris鈥揝winkels substitutional adsorption isotherms. The number of water molecules (X) replaced by a molecule of organic adsorbate was determined from the different substitutional adsorption isotherms applied to the data obtained from EIS experiments.