| LIU Xin-hua,DU Jiao,WANG Qing-hui,SUN Cai-yun.Study on Inhibition Mechanism and Inhibition Action of Amino Acid Pickling Corrosion Inhibitor[J],39(6):51-54 |
| Study on Inhibition Mechanism and Inhibition Action of Amino Acid Pickling Corrosion Inhibitor |
| Received:July 27, 2010 Revised:December 10, 2010 |
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| DOI： |
| KeyWord:sulfuric acid carbon steel aminl acid inhibitor inhibition mechanism influence factor |
| Author | Institution |
| LIU Xin-hua |
College of Light Industry, Hebei Polytechnic University, Tangshan , China |
| DU Jiao |
College of Light Industry, Hebei Polytechnic University, Tangshan , China |
| WANG Qing-hui |
College of Light Industry, Hebei Polytechnic University, Tangshan , China |
| SUN Cai-yun |
College of Light Industry, Hebei Polytechnic University, Tangshan , China |
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| Abstract: |
| Inhibition action of steel on inhibitator of amino acid and inhibition mechanism were studied by weightloss and electrochemical method in H2SO4solutions. The potentiodynamic polarization curve results manifested that compound amino acid pickling inhibitors were mixed-type inhibitors which inhibit the reactions of anode and cathode. AC impedance results showed that the ternary complex inhibitors had a good synergistic effect and a high inhibition efficiency which could be proved by Resistance(Rt), double-layer capacitance(Cdl), resistance modulus(︱ Z︱), and phase angle from the Nyquist chart, Bode chart and phase angle chart. The weight-loss method showed that the corrosion efficiency of composite amino acids was over 90% in 0～ 16 hours, 30～ 50℃ and 0.4～ 2.0 mol/ L sulfuric acid. |
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