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《Journal of Chongqing University》 2010-11
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Adsorption and corrosion inhibition behavior of mild steel by one derivative of triazole-phenylamide in acid solution

TAO Zhi-hua1,ZHANG Sheng-tao1,LI Wei-hua2,HOU Bao-rong2(1.College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,P.R.China;2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao,Shandong 266071,P.R.China)  
A new triazole-phenylamide derivative(DOT)is synthesized and its inhibiting action on the corrosion of mild steel in 1mol/L HCl solution is investigated by means of potentiodynamic polarization,electrochemical impedance spectroscopy(EIS)and weight loss measurements.Thermodynamic and kinetic parameters are calculated and discussed.Then the surface morphology is studied by scanning electron microscopy(SEM).Results show that DOT strongly inhibits the corrosion of Q235.The inhibition efficiency of 0.001mol·L-1 DOT is more than 96%.Polarization curves indicate that the DOT acts as a mixed-type inhibitor,the cathodic and anodic processes of corrosion are suppressed.Thermodynamic and kinetic parameters are obtained from weight loss of the different experimental temperatures,which suggests that at different temperatures(298~333K) the adsorption of DOT on metal surface obey Langmuir adsorption isotherm model.The adsorption processes are exothermic reaction and belong to chemisorption and physisorption.
【Fund】: 国家高技术研究发展计划(863计划)资助项目(2008AA09Z31);; 重庆市工程技术研究中心建设资助项目(STC2009CB5014)
【CateGory Index】: TG174.42
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