Adsorption and corrosion inhibition of phytic acid calcium on the copper surface in 3wt% NaCl solution
Adsorption and corrosion inhibition of phytic acid calcium on the copper surface in 3wt% NaCl solution
复制标题
DOI：
10.1016/j.corsci.2014.02.001
复制
发表时间：
2014-06
影响因子：
8.3
通讯作者：
Chuan-chuan Li;Xiaoyu Guo;Shu Shen;P. Song;Ting Xu;Y. Wen;Haifeng Yang
中科院分区：
文献类型：
--
作者：
Chuan-chuan Li;Xiaoyu Guo;Shu Shen;P. Song;Ting Xu;Y. Wen;Haifeng Yang
采用动电位极化曲线、电化学阻抗谱（EIS）和拉曼光谱研究了植酸钙（PAC）膜在3wt%NaCl溶液中对铜表面的吸附和腐蚀防护作用。极化曲线表明，PAC是一种混合型缓蚀剂，对阴极和阳极腐蚀电流均有影响。在优化条件下，PAC膜的缓蚀率达到92.53%。PAC分子在表面的吸附符合Langmuir吸附等温式，标准吉布斯自由能为−37.32 kJ mol− 1，为化学吸附。拉曼光谱研究表明PAC分子通过P单键O基团化学锚定在表面。
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−1indicated a chemisorptive way. Raman studies suggested that PAC molecule chemically anchored at the surface via Psingle bondO groups.