Effect of pentaerythritol glycoside on steel rebars passivation film in 3.5% NaCl Saturated Ca(OH)2 Solution

Journal of Chinese Society for Corrosion and protection

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Abstract Reinforced concrete structures in the marine environments usually encounter the serious degradation because of the steel rebar corrosion. The addition of corrosion inhibitors of pentaerythritol glycoside (PG) can alleviate the corrosion damages on steel rebars passivation film. Using different electrochemical methods such as polarization curves, Mott-Schottky analysis technique and the surface analysis, the effects of PG on the corrosion behaviors and the passive film performance of steel rebar in 3.5% NaCl saturated Ca(OH)2 solution simulating concrete pores were investigated. The results of potentiodynamic polarization indicate that the PG could accelerate the stability adsorption film formed on the metal surface. Mott-Schottky (M-S) measurements in the range of potential from -0.5 to -0.1V (vs. SCE) show that the curves of Csc-2 versus E of steel rebar electrodes follow a linear M-S relationship with a positive slope, suggesting the passive film formed on the steel rebar surface is n-type semi-conductor. Moreover, with increasing concentration of inhibitor, the carrier density in passive film decreases, indicating that the passive film formed on steel rebar surface in the presence of PG is more compact and stable than that in the absence of inhibitor, and the corrosion resistance of passive film is gradually enhanced.

Received: 10 May 2013

ZTFLH:

O646

Fund: the Education department of liaoning province Research Program

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. Effect of pentaerythritol glycoside on steel rebars passivation film in 3.5% NaCl Saturated Ca(OH)2 Solution. Journal of Chinese Society for Corrosion and protection, 0, 0(0): 0-0.

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https://www.amse.org.cn/Jwk3_jss_new/zgfs/EN/ OR https://www.amse.org.cn/Jwk3_jss_new/zgfs/EN/Y0/V0/I0/0

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