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| CORROSION INHIBITION ACTIONS OF BIS-BENZOTRIAZOLE MANNICH ALKALI COMPOUNDS FOR COPPERIN 5% NAHCO3 SOLUTION |
| ZUO Shurui, LIU Ruiquan |
| College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046 |
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Abstract Two bis-benzotriazole Mannich alkali compounds, 1,2-di(1H-benzo[d][1,2,3] triazol-1-yl)-N1,N2-diphenylethane-1,2-diamine (BBTAP) and 1,2-di(1H-benzo[d][1,2,3] triazol-1-yl)-N1, N2-dimethylethane-1, 2-diamine (BBTAM), were synthesized using benzotriazole (BTA) as matrix. The inhibition actions and adsorption behaviors of BBTAP, BBTAM and BTA on copper in aqueous NaHCO3 (mass fraction 5%) solution were investigated by means of mass loss and electrochemical techniques including polarization curve and electrochem-ical impedance spectroscopy (EIS). The results showed that BBTAP, BBTAM and BTA exhibited good inhibition effect for copper in 5% NaHCO3 solution at higher temperature and BBTAP, BBTAM had better corrosion inhibition efficiency than that of BTA. The results of experiment revealed that the adsorption processes were exothermic reaction and belonged to physical and chemical mix absorption, the adsorption behaviors followed Langmuir isotherm.
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Received: 03 February 2010
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Corresponding Authors:
LIU Ruiquan
E-mail: liurq2010@sina.com
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