Synergistic inhibition between dodecylamine and potassium iodide on the corrosion of cold rolled steel in 0.1 M phosphoric acid

被引：31

作者：

Qu, Q. ^{[1
]}

Hao, Z. ^{[1
]}

Jiang, S. ^{[1
]}

Li, L. ^{[2
]}

Bai, W. ^{[3
]}

机构：

[1] Yunnan Univ, Dept Chem, Kunming 650091, Peoples R China

[2] Yunnan Univ, Lab Conservat & Utilizat Bioresources, Kunming 650091, Peoples R China

[3] Yunnan Nationalities Univ, Dept Chem, Kunming 650091, Peoples R China

来源：

MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2008年 / 59卷 / 11期

关键词：

D O I：

10.1002/maco.200804176

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion inhibition of cold rolled steel in 0.1 M aerated phosphoric acid (H3PO4) in the presence of dodecylamine (DDA) and potassium iodide (KI) has been investigated by Tafel polarization curve and electrochemical impedence spectroscopy (EIS) at 20 degrees C. The results obtained from polarization curve show that the inhibition efficiency of DDA with and without KI increases with increase in concentration of DDA but the inhibition efficiency of DDA without KI is not too high. A synergistic effect exists when DDA and KI are combined together to prevent cold rolled steel corrosion in 0.1 M H3PO4. All impedance spectra in EIS tests exhibit one capacitive loop which indicates that the corrosion reaction is controlled by charge transfer process. Inhibition efficiencies obtained from Tafel polarization, transfer resistance (R-t) are consistent.

引用

页码：883 / 888

页数：6

共 27 条

[1] The inhibition of 4-(2′-amino-5′-methylphenylazo) antipyrine on corrosion of mild steel in HCl solution [J].