scholarly journals Corrosion inhibition effect of Cannabis sativa leaves extracts on N80 steel in 15% HCl solution: Experimental, Surface and Computational studies

2021 ◽  
pp. ArticleID:210516
Author(s):  
Dengdeng Zheng ◽  
Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 449 ◽  
Author(s):  
Mingjin Tang ◽  
Jianbo Li ◽  
Zhida Li ◽  
Luoping Fu ◽  
Bo Zeng ◽  
...  

In this paper, a corrosion inhibitor containing nitrogen atoms and a conjugated π bond was synthesised, and its final product synthesised by the optimal conditions of the orthogonal test results is named multi-mannich base (MBT). The corrosion inhibition effect on the N80 steel sheet of the corrosion inhibitor was evaluated in a CO2 saturated solution containing 3 wt % NaCl; the corrosion rate was 0.0446 mm/a and the corrosion inhibition rate was 90.4%. Through electrochemical and adsorption theory study, MBT is a mixed corrosion inhibitor that mainly shows cathode suppression capacity. The adsorption of MBT on the surface of the steel sheet follows the Langmuir adsorption isotherm; it can be spontaneously adsorbed on the surface of the N80 steel sheet, which has a good corrosion inhibition effect. The surface of the N80 steel sheet was microscopically characterised by atomic force microscope (AFM). It can be seen from the results that the N80 steel sheet with MBT added is significantly different from the blank control group; the surface of the steel sheet is relatively smooth, indicating that MBT forms an effective protective film on the surface of N80 steel, which inhibits the steel sheet.


2013 ◽  
Vol 781-784 ◽  
pp. 299-303
Author(s):  
Shu Lan Cai ◽  
Kang Quan Qiao ◽  
Fa Mei Feng

A new corrosion inhibior N,N-diethylammonium O,O-di (p-chlorophenyl) dithiophosphate (EDPDP) has been synthesized and its inhibition effect towards the corrosion of carbon steel in 1.0 molL-1 HCl solution at 25 °C has been investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. The obtained results show that EDPDP is a excellent inhibitor and the inhibition efficiencies exceed 90 %. The polarization measurements reveal that EDPDP is a mixed type inhibitor and the equivalent circuit model of the corrosion inhibition process is obtained by the analysis of EIS data.


RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 70832-70848 ◽  
Author(s):  
M. Yadav ◽  
R. R. Sinha ◽  
Sumit Kumar ◽  
T. K. Sarkar

The effect of synthesized spiropyrimidinethiones on the corrosion of mild steel in 15% HCl solution was investigated by using weight loss and electrochemical methods.


2019 ◽  
Vol 483 ◽  
pp. 901-911 ◽  
Author(s):  
Li Feng ◽  
Shengtao Zhang ◽  
Yao Lu ◽  
Bochuan Tan ◽  
Shijin Chen ◽  
...  

RSC Advances ◽  
2019 ◽  
Vol 9 (26) ◽  
pp. 14782-14796 ◽  
Author(s):  
Omar Dagdag ◽  
Zaki Safi ◽  
Hamid Erramli ◽  
Omar Cherkaoui ◽  
Nuha Wazzan ◽  
...  

Herein, the synthesis, characterization and corrosion inhibition effectiveness of two aromatic epoxy monomers (AEMs) in carbon steel corrosive dissolution in 1 M HCl solution was investigated using computational and experimental techniques.


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