Journal
RSC ADVANCES
Volume 5, Issue 114, Pages 93724-93732Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra19088f
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Funding
- National Natural Science Foundation of China [21273293, 21373281, 21573028]
- Program for New Century Excellent Talents in University [NCET-12-0587, NCET-13-0633]
- Project for Distinguished Young Scholars in Chongqing [cstc2014jcyjjq100004]
- Program of China Scholarships Council [201406055006]
- Fundamental Research Funds for the Central Universities [CDJZR13225501, CDJZR14228801]
- sharing fund of Chongqing University's Large-scale Equipment
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The aqueous Michelia alba leaf extract (MALE) was first evaluated as an inhibitor to the corrosion of different steel materials (industrial pure iron, stainless steel and carbon steel) in hydrochloric acid. The adsorption and corrosion inhibition of MALE were investigated by potentiodynamic polarization, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and quantum chemical calculations. The results showed that MALE acted as a highly-efficient mixed-type inhibitor for all steels and increasing temperatures benefited its corrosion inhibition. The adsorption of MALE on steel surfaces obeyed a Langmuir adsorption isotherm. Quantum chemical calculation results provided reasonable theoretical explanation for the inhibition property of MALE.
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