Inhibition of Copper Corrosion in 3.0% NaCl Solution by N-Phenyl-1,4-phenylenediamine
Inhibition of Copper Corrosion in 3.0% NaCl Solution by N-Phenyl-1,4-phenylenediamine
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DOI：
10.1149/1.2018254
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发表时间：
2005-10
影响因子：
3.9
通讯作者：
El-Sayed M. Sherif;Su-Moon Park
中科院分区：
文献类型：
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作者：
El-Sayed M. Sherif;Su-Moon Park
采用动电位极化曲线、电化学阻抗谱、失重法、红外和紫外-可见吸收光谱、扫描电镜（SEM）和X射线能谱（EDX）研究了N-苯基-1，4-苯二胺（NPPD）在3.0%NaCl水溶液中对铜的缓蚀作用。动电位极化测量表明，NPPD的存在显着降低了这些溶液中的阴极、阳极和腐蚀电流。阻抗测量结果表明，电荷转移电阻增加后，增加NPPD浓度。通过失重测量得到的1.0 mM NPPD的抑制效率约为90%，在其浓度为5.0 mM时增加到约96%。傅立叶变换红外、紫外可见、SEM和EDX测量表明，NPPD在开路电位下吸附在铜表面上，通过在其表面上形成保护层来防止铜被腐蚀。结果表明，铜在充氧溶液中的腐蚀程度为充氧溶液>曝气溶液>除氧溶液; NPPD是一种良好的混合型铜缓蚀剂，其缓蚀效率为充氧溶液>曝气溶液>除氧溶液。
Inhibition of copper corrosion by N-phenyl-1,4-phenylenediamine (NPPD) has been investigated in deaerated, aerated, and oxygenated aqueous 3.0% NaCI solutions using potentiodynamic polarization, electrochemical impedance spectroscopy, weight loss, infrared and UV-visible absorption spectroscopic, scanning electron microscopic (SEM), and energy-dispersive X-ray (EDX) measurements. Potentiodynamic polarization measurements showed that the presence of NPPD significantly decreases cathodic, anodic, and corrosion currents in these solutions. Impedance measurements indicated that the charge-transfer resistances increase upon increasing the NPPD concentration. The inhibition efficiency of 1.0 mM NPPD obtained by weight-loss measurements is about 90%, increasing to about 96% at its concentration of 5.0 mM. Fourier transform infrared, UV-visible, SEM, and EDX measurements revealed that NPPD is adsorbed on the copper surface at open-circuit potentials, preventing copper from being corroded by forming a protective layer on its surface. All these results showed that corrosion of copper decreases in the order of oxygenated > aerated > deaerated solutions, and NPPD is a good mixed-type inhibitor for copper corrosion with its inhibition efficiency in the order of oxygenated > aerated > deaerated solutions.