EFFCTS OF SULPHATE AND TEMPERATURE ON CORROSION BEHAVIOR OF REBAR IN SIMULATED PORE SOLUTIONS

J Chin Soc Corr Pro

1999, Vol. 19

Issue (1): 55-59 DOI:

Research Report

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EFFCTS OF SULPHATE AND TEMPERATURE ON CORROSION BEHAVIOR OF REBAR IN SIMULATED PORE SOLUTIONS

Xiaomin Liu;Zhiming Shi;;

北京科技大学材料物理系

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Abstract The effects of sulphate and temperature on the corrosion behavior of rebar in simulated pore solutions were studied by potentiodynamic polarization and electrochemical impedance spectroscopy(EIS).The results showed that in the presence of chloride ions in simulated pore solution,sulphate ions had inhibition action,which enhanced the corrosion resistance of rebar.The inhibition mechanism of sulphate could be explained by the xompetitive adsorption between sulphate ions and chloride ions on the rebar surface.The polarization resistance(Rp) decreased with the ncrease in temperature and the decrease in pH.Meanwhile,the activation energy of corrosion reaction of rebar was calculated.With the elevation of the pH value from 9.75 to 12.45, the activation energy increased from 43.44 to 62.44kJ/mol.K.

Key words: rebar simulated pore solution sulphate temperature

Received: 18 July 2005

Corresponding Authors: Xiaomin Liu

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Xiaomin Liu; Zhiming Shi. EFFCTS OF SULPHATE AND TEMPERATURE ON CORROSION BEHAVIOR OF REBAR IN SIMULATED PORE SOLUTIONS. J Chin Soc Corr Pro, 1999, 19(1): 55-59 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I1/55

1Cornet I.Materials Protection;1964,3:90
2Schikorr G Werkstoffe Korrosion Mannheim; 1964; 15: 46
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4刘晓敏等.腐蚀科学与防护技术,1997,9(2):140
5Bohni H, Uhlig H H.J. Electrochem Soc., 1969, 116(7): 909

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