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- W2790792263 abstract "The inhibition effect and mechanism of sodium oleate (SO) on pitting corrosion of carbon steel in simulated concrete pore solution were studied by using methods of potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electronic microscopy and X-rays photoelectron spectroscopy. In simulated concrete pore solution (pH 12.5), carbon steel showed pitting corrosion behavior during the early immersion period, and SO effectively increased the pitting breakdown potential. After 10 h immersion in SCP solution, passivation was achieved and the pitting potential increased obviously. The inhibition efficiency was over 98% with 0.0008 mol/L SO addition, and after 720 h immersion the corrosion current density with SO was still one order of magnitude lower than that without SO. The results confirm that SO may inhibit the corrosion process in three ways: First, SO competitively adsorbs on the surface, decreasing the adsorption of aggressive Cl−. Then, the carboxyl group in adsorbed C17H33COO− anion may promote oxidation of Fe atoms on the surface, strengthening passivation. Thirdly, the adsorbed SO forms a compact inhibition film, which would further retard diffusion and approach of water, oxygen and aggressive species to the surface." @default.
- W2790792263 created "2018-03-29" @default.
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- W2790792263 date "2018-04-01" @default.
- W2790792263 modified "2023-09-26" @default.
- W2790792263 title "Inhibition effect and mechanism of sodium oleate on passivation and pitting corrosion of steel in simulated concrete pore solution" @default.
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- W2790792263 doi "https://doi.org/10.1016/j.conbuildmat.2018.01.170" @default.
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