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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 55, Number 2
JKCSEZ 55(2)
April 20, 2011 

 
Title
Effect of β-Blocker Inhibitors on Aluminum Corrosion

알루미늄 부식에 대한 베타-차단제 억제제 효과
Author
A S Fouda*, G Y El Ewady, K Shalabi

A S Fouda*, G Y El Ewady, K Shalabi
Keywords
알루미늄, 억제, 부식, 베타-차단제 약품, 염산 , Aluminum, inhibition corrosion, β-blocker drugs, HCl
Abstract
베타 차단제 억제제(atenolol, propranolol, timolol and nadolol)의 존재와 부존 하에서 0.1M HCl 용액에 담긴 알루 미늄의 부식작용을 연구하였다. 이 연구에 무게감량, 변전위 편극, 전기화학 임피던스 분석법이 사용되었다. 억제 효과는 억제제의 농도 증가에 따라 증가하였으며, 온도가 증가함에 따라 감소하였다. 모든 억제제들은 Frumkin 등온을 따르는 알 루미늄 표면에 흡착되었다. 부식반응은 전하이동과정에 의해 조절됨을 발견하였다. 억제 효과 측정을 위해 사용된 실험방 법 들에 대해 조사한 결과 모두 억제효과가 우수하였다.

Corrosion of aluminum in 0.1 M HCl solution in the absence and presence of β-blocker inhibitors (atenolol, propranolol, timolol and nadolol) was investigated using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increased with inhibitor concentration and decreased with rise of temperature. Potentiodynamic polarization curves revealed that they acted as cathodic inhibitors. Some thermodynamic parameters were calculated and discussed. All inhibitors were adsorbed on Al surface obeying Frumkin isotherm. All EIS tests exhibited one capacitive loop which indicates that the corrosion reaction is controlled by charge transfer process. The inhibition efficiencies of all test methods were in good agreement.

Page
268 - 278
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