Adsorption and corrosion inhibition of phytic acid calcium on the copper surface in 3 wt% NaCl solution

被引：99
|
作者：
Li, Chuan-chuan
Guo, Xiao-yu
Shen, Shu
Song, Ping
Xu, Ting
Wen, Ying
Yang, Hai-Feng [1 ]
机构：
[1] Shanghai Normal Univ, Educ Minist, Key Lab Resource Chem, Shanghai Key Lab Rare Earth Funct Mat, Shanghai 200234, Peoples R China
来源：
CORROSION SCIENCE | 2014年 / 83卷
基金：
中国国家自然科学基金;
关键词：
Copper; EIS; Polarization; Raman spectroscopy; Neutral inhibition; NEUTRAL CHLORIDE MEDIA; M HCL SOLUTION; MILD-STEEL; IMPEDANCE SPECTROSCOPY; RAMAN-SPECTROSCOPY; PICKLING SOLUTIONS; AQUEOUS-SOLUTION; SELECTION-RULES; CARBON-STEEL; BEHAVIOR;
D O I：
10.1016/j.corsci.2014.02.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The adsorption and corrosion protection effect of phytic acid calcium (PAC) film on the copper surface in 3 wt% NaCl solution was investigated using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and Raman spectroscopy. Polarization curves indicate that PAC is a mixed inhibitor, affecting both cathodic and anodic corrosion currents. The inhibition efficiency of PAC film reached 92.53% at an optimized condition. Adsorption of PAC molecules on the surface followed Langmuir adsorption isotherm and the standard Gibbs energy of -37.32 kJ mol(-1) indicated a chemisorptive way. Raman studies suggested that PAC molecule chemically anchored at the surface via P-O groups. (c) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：147 / 154
页数：8
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