| Autor: |
Wang Xiaoxian, Liu Jiaping, Mu Song, Zhou Yichuan |
| Předmět: |
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| Zdroj: |
Journal of Southeast University / Dongnan Daxue Xuebao; Nov2022, Vol. 52 Issue 6, p1161-1170, 10p |
| Abstrakt: |
To investigate the effects of sodium p-glycerophosphate on the corrosion resistance of carbon steel bar in high alkali environment, the corrosion resistance performances of sodium p-glycerophosphate on carbon steel in the passive film formation stage and maintenance stage after adding NaCl in high alkali environment were studied by open circuit potential (OCP), linear polarization method (LPR), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP), and the effects of sodium p-glycerophosphate on the evolution of passive film was analyzed. The results show that sodium p-glycerophosphate can promote the formation of a denser and more stable passive film on the surface of carbon steel in a highly alkaline environment, and can increase the critical chloride ion concentration Ccrit of carbon steel compared with the simulated pore solution of a single ion system. In the two NaOH solutions (pH =12. 6 ±0.2) without and with concentration of 0.1 mol/L β-glycerophosphate added, more than 80% of the passivation film is formed at 72 h. The Ccrit values of carbon steel in NaOH solution and NaOH solution with concentration of 0.1 mol/L β-glyc-erophosphate added are 0.02 and 0. 07 mol/L respectively, indicating that sodium p-glycerophosphate has a good protective effect on carbon steel in the high alkali solution, and has good corrosion resistance in the process of NaCl corrosion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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