Amino acids as green corrosion inhibitors

2022 ◽  
pp. 233-242
Author(s):  
Chandrabhan Verma
Keyword(s):  
Amino Acids ◽  
Corrosion Inhibitors ◽  
Green Corrosion Inhibitors

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

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.

scholarly journals Greener Approach towards Corrosion Inhibition

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Neha Patni ◽  
Shruti Agarwal ◽  
Pallav Shah
Keyword(s):  
Heavy Metals ◽  
Amino Acids ◽  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
Organic Dyes ◽  
Plant Origin ◽  
Toxic Compounds ◽  
Green Inhibitors ◽  
Protective Films ◽  
Organic Corrosion Inhibitors

Corrosion control of metals is technically, economically, environmentally, and aesthetically important. The best option is to use inhibitors for protecting metals and alloys against corrosion. As organic corrosion inhibitors are toxic in nature, so green inhibitors which are biodegradable, without any heavy metals and other toxic compounds, are promoted. Also plant products are inexpensive, renewable, and readily available. Tannins, organic amino acids, alkaloids, and organic dyes of plant origin have good corrosion-inhibiting abilities. Plant extracts contain many organic compounds, having polar atoms such as O, P, S, and N. These are adsorbed on the metal surface by these polar atoms, and protective films are formed, and various adsorption isotherms are obeyed. Various types of green inhibitors and their effect on different metals are mentioned in the paper.

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