Theoretical study of inhibition efficiencies of some amino acids on corrosion of carbon steel in acidic media: green corrosion inhibitors

Amino Acids ◽  
2015 ◽  
Vol 48 (1) ◽  
pp. 291-306 ◽  
Author(s):  
Maryam Dehdab ◽  
Mehdi Shahraki ◽  
Sayyed Mostafa Habibi-Khorassani
Keyword(s):  
Amino Acids ◽  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
Theoretical Study ◽  
Acidic Media ◽  
Green Corrosion Inhibitors

scholarly journals Amino acids as corrosion inhibitors for copper in acidic medium: Experimental and theoretical study

2013 ◽  
Vol 78 (12) ◽  
pp. 2069-2086 ◽  
Author(s):  
Ingrid Milosev ◽  
Jasminka Pavlinac ◽  
Milan Hodoscek ◽  
Antonija Lesar
Keyword(s):  
Amino Acids ◽  
Density Functional ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Theoretical Study ◽  
Theoretical Calculations ◽  
Dynamic Simulations ◽  
Protonated Forms ◽  
Dynamics Simulations ◽  
Green Corrosion Inhibitors

Experimental electrochemical methods combined with quantum chemical calculations and molecular dynamics simulations were used to investigate the possibility of use various amino acids as ?green? corrosion inhibitors for copper in 0.5 M HCl solution. Among eleven amino acids studied, cysteine achieved the highest inhibitor effectiveness reaching 52% at 10 mM concentration. Other amino acids reached achieved effectiveness less than 25%, some of them even acted as corrosion accelerators. Based on the experimental results, theoretical calculations and simulations were focused on cysteine and alanine. The electronic and reactivity parameters of their protonated forms in electrical double layer were evaluated by density functional calculations. In addition, molecular dynamic simulations were introduced to follow the adsorption behaviour of these two amino acids at the Cu(111) surface in the electrolyte solution. The results indicate that the orientation of both molecules is nearly parallel to the surface except of ammonium group which is directed away from the surface. Therefore, as the orientation of the cysteine and alanine molecules at the surface is similar, thiol functional group is responsible for superior inhibition efficiency of cysteine.

Amino acids modified konjac glucomannan as green corrosion inhibitors for mild steel in HCl solution

2018 ◽  
Vol 181 ◽  
pp. 191-199 ◽  
Author(s):  
Kegui Zhang ◽  
Wenzhong Yang ◽  
Xiaoshuang Yin ◽  
Yun Chen ◽  
Ying Liu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Mild Steel ◽  
Corrosion Inhibitors ◽  
Konjac Glucomannan ◽  
Green Corrosion Inhibitors ◽  
Hcl Solution

Tests of Imidazoline-Based Corrosion Inhibitors for Low-Carbon Steel Tending to Absorb Hydrogen in Acidic Media

2015 ◽  
Vol 51 (3) ◽  
pp. 252-256 ◽  
Author(s):  
M. D. Plotnikova ◽  
I. A. Tiunov ◽  
A. A. Novikov ◽  
A. A. Khrenova ◽  
A. B. Shein
Keyword(s):  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Acidic Media
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