| NIE Jin-yan,SI Yun-sen,YU Qiang,WANG Zhao-di.Contrast Study on the Inhibitive Effect of N,N-diphenyl Thiourea and Thiourea on the Corrosion of A3 Steel in Acid Medium[J],39(1):51-55 |
| Contrast Study on the Inhibitive Effect of N,N-diphenyl Thiourea and Thiourea on the Corrosion of A3 Steel in Acid Medium |
| Received:September 01, 2009 Revised:February 10, 2010 |
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| DOI： |
| KeyWord:A3 steel N,N-diphenyl thiourea Sulphuric acid Inhibitive effect |
| Author | Institution |
| NIE Jin-yan |
Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming , China |
| SI Yun-sen |
Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming , China |
| YU Qiang |
Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming , China |
| WANG Zhao-di |
Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming , China |
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| Abstract: |
| The inhibitive behavior and mechanism of N,N-diphenyl thiourea(DPH-TU)on the corrosion of A3 steel in 5%H2SO4medium were studied using polarizationcurves measurements, electrochemical impedance spectroscopy (EIS)and quantum chemistry methodsin order to investigate the inhibitive effect of DPH-TUin H2SO4solution and providing important theoretical reference to the actual production as corrosion inhibitor. The results show that DPH-TU is an effective and mixing type inhibitor. It is suggested that the adsorption of DPH-TU on A3 mild steel be chemosorption and exothermic reaction. The corresponding thermodynamic parameters of the adsorption process forDPH-TUare calculated according to the El-Awady kinetic model.Compared with the thiourea, the inhibition effect of DPH-TUis superior to thiourea. |
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