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| Comparative Study on Corrosion Inhibition of Organic/Inorganic Inhibitors for Reinforcement in Simulated Concrete Pore Solution |
| Received:April 11, 2020 Revised:April 21, 2020 |
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| DOI：10.7643/issn.1672-9242.2021.01.018 |
| KeyWord::Pitting corrosion of metals. A review of the critical factors[J]. ChemInform, 1998, 29(32):2186-2197. |
| Author | Institution |
| ZHAO Yao |
Institute of Marine Science and Technology, Shandong University, Qingdao , China |
| DENG Hao |
Institute of Marine Science and Technology, Shandong University, Qingdao , China |
| CHENG Xin |
Institute of Marine Science and Technology, Shandong University, Qingdao , China |
| SHI Jia-shun |
Institute of Marine Science and Technology, Shandong University, Qingdao , China |
| CHEN Shi-qiang |
Institute of Marine Science and Technology, Shandong University, Qingdao , China |
| LIU Guang-zhou |
Institute of Marine Science and Technology, Shandong University, Qingdao , China |
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| Abstract: |
| To evaluate the effects of five organic/inorganic inhibitors on corrosion behavior of Q235 carbon steel in simulated concrete pore solution (SCP) containing 3.5% NaCl through the potentiodynamic polarization curve and electrochemical impedance spectroscopy (EIS). Among of these inhibitors, 0.0015 mol/L D-sodium gluconate shows the best IE, i.e. after soaking for 30 days, Rct and IE reach 282.74×104 Ω.cm2 and 99.99%, respectively. Therefore, 0.0015 mol/L D-sodium gluconate has an optimal application value for Q235 carbon steel in simulated seawater concrete pore solution. Results show that there is the optimal concentration/ratio for each corrosion inhibitor, which significantly improves the pitting potential (Eb) and charge transfer resistance (Rct) of the reinforcement in SCP solution containing Cl‒. The corrosion inhibition efficiency (IE) increases with the immersion time. |
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