期刊
ROYAL SOCIETY OPEN SCIENCE
卷 6, 期 8, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsos.190192
关键词
inhibition; mild steel; EIS; theoretical calculation; acid corrosion
资金
- National Natural Science Foundation of China [21403194, 51771173]
- Natural Science Foundation of Shandong Province [ZR2019QEM003, ZR2014BQ027, ZR2016BP11]
- Project of Focus on Research and Development Plan in Shandong Province [2019GSF111048]
- Major Project of Binzhou University [2017ZDL02]
- Scientific Research Fund of Binzhou University [BZXYLG1904, BZXYFB20140805, BZXYL1403]
Three new benzaldehyde thiosemicarbazone derivatives namely benzaldehyde thiosemicarbazone (BST), 4-carboxyl benzaldehyde thiosemicarbazone (PBST) and 2-carboxyl benzaldehyde thiosemicarbazone (OCT) were synthesized and their inhibition effects on mild steel corrosion in 0.5 M H2SO4 solution were studied systematically using gravimetric and electrochemical measurements. Weight loss results revealed that PBST exhibited the highest inhibition efficiency of 96.6% among the investigated compounds when the concentration was 300 mu M. The analysis of polarization curves indicated that the three benzaldehyde thiosemicarbazone derivatives acted as mixed type inhibitors and PBST and OCT predominantly anodic. The adsorption process of all these benzaldehyde thiosemicarbazone derivatives on Q235 steel surface in 0.5 M H2SO4 solution conformed to Langmuir adsorption isotherm. Scanning electron microscopy was conducted to show the presence of benzaldehyde thiosemicarbazone derivatives on Q235 mild steel surface. The results of theoretical calculations were in good agreement with that of experimental measurements.
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