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Citation: ZENG Han, ZHAO Shu-Xian, LI Ya-Wei. Corrosion Inhibition and Antibacterial Effects of Copolymer NIPAM-co-BPCP on N80 Steel Panel[J]. Chinese Journal of Applied Chemistry, ;2010, 27(4): 478-483. doi: 10.3724/SP.J.1095.2010.90351 shu

Corrosion Inhibition and Antibacterial Effects of Copolymer NIPAM-co-BPCP on N80 Steel Panel

Academy of Life Science and chemistry, Xinjiang Normal University, Urumuqi 830054

Received Date: 18 May 2009
Revised Date: 29 July 2009

A new corrosion inhibitor and universal antibacterial reagent,namely,the copolymer of N-isopropylacrylamide(NIPAM) and N-allyl-1-benzoyl-3-phenyl-4,5-dihydro-4-formamido pyrazole(BPCP) was prepared.Its inhibitory effect on the corrosion of N80 steel panel in 1 molar hydrochloric acid solution was investigated at room temperature via the static mass-loss method,and the adsorption of the copolymer molecules on the surface of N80 steel panel was studied through electrochemical impedance spectroscopy(EIS). Minimal inhibitory concentration(MIC) of the copolymer for different kinds of bacterials was determined with the liquor dilution approach.Results obtained from the experiments indicate that the copolymer is an efficient chemical corrosion inhibitor for N80 steel panel in 1 mol/L HCl solution.The inhibition efficiency of the copolymer increases with the increase in inhibitor concentration within a mass content range from 0.5 g/L to 7.0 g/L,reaching the maximum value of 90.3% at a inhibitor concentration of 6 g/L,only half of the amount of the reported inhibitor in the literature,1/10 of the amount of small molecule inhibitor NABPPAA.Adsorption of copolymer on N80 steel panel's surface follows Langmuir's isotherm within experimental mass concentration range.Calculated adsorption enthalpy of the copolymer on N80 steel panel surface is 30.446 kJ/mol.Its adsorption model can be mainly ascribed to the chemical nature of adsorption(chemisorptions) according to the adsorption enthalpy.Large and persistant inhibitory effect of the copolymer on N80 steel erosion in acid solution is observed within a temperature range of 25~80℃.The results reveal that the copolymer has a broad inhibitory and a good germicidal effect on several kinds of bacteria.
- NIPAM-co-BPCP,
- corrosion inhibitor,
- adsorption behavior,
- antibacterial action
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