Abstract:
The study of carbon steel corrosion is paramount in many industries as corrosion of metal surfaces incurs massive losses to the industries. Numerous authors worked on corrosion inhibitors but the results shown by the amino acids are promising. Due to this fact, the corrosion rate of aqueous methionine solvents against carbon steel with weight-loss method was studied in this work. In this weight-loss method, three carbon steel strip coupons were used. Preparation of coupons was a major step, as they are cleaned thoroughly with sandpapers as per the standards of ASTM G-1-90. The metal specimens were dipped in aqueous methionine solvents for specified period. Once the corrosion time was completed, metal specimens were washed, cleaned, weighed and put into the formula for calculation of results. The results showed that without using the methionine, the corrosion of carbon steel was 2.41 mm/year. For a lower concentration solution (2%MTH, 8%Methanol, 20%MEA ), the corrosion against carbon steel dropped to 0.96 mm/year with a protection efficiency of 60.166%. For medium concentration solution (5%MTH, 5%Methanol, 20%MEA), the corrosion reached 0.92 mm/year with a protection efficiency of 61.826%. But as the concentration of methionine was increased, it was found that the corrosion also increased greatly, because at a higher concentration of methionine (8%MTH, 2%Methanol, 20%MEA), corrosion became 0.84 mm/year with a protection efficiency of about 65.145%. The presence of methionine lowers the corrosion rate even much better than other amino acids. The inhibition efficiencies of methionine are augmented with improved methionine concentration. Methionine was able to give 65.145% inhibition efficiencies for carbon steel. The new solvent mix can be employed as an efficient corrosion inhibitor.
Page(s):
0-0
DOI:
DOI not available
Published:
Journal: Sixth International Conference on Sustainability in Process Industries (SPI) 19-20 Octover 2022 (Book of Abstracts), Volume: 0, Issue: 0, Year: 2022
Keywords:
Amino acids
,
Corrosion
,
Methanol MEAMonoethanolamine
,
Carbon Steel
,
Weight loss method
,
MTHMethionine