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Corrosion inhibition of mild steel with tolyltriazole

Fathabadi, H. E ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1590/1980-5373-MR-2020-0395
  3. Publisher: Universidade Federal de Sao Carlos , 2021
  4. Abstract:
  5. Tolyltriazole (TTA) is a well-defined corrosion inhibitor for copper and copper alloys. However, there is little literature about its corrosion inhibition performance for mild steels in corrosive environments. This paper studied the electrochemical behavior of TTA in 0.5 M HCl solutions. Also, the morphology and nature of TTA layers on the steel surface were investigated. Electrochemical results showed that TTA is an excellent corrosion inhibitor for mild steel in acidic media with an efficiency of 91% for 0.07 M concentration. The results also indicated that TTA is a mixed-type inhibitor. XRD analysis revealed that the inhibition mechanism of TTA is based on the formation of an organic film due to the physically adsorbed molecules of TTA. AFM and EDS results showed that the formed layers decrease the adsorptivity of corrosive elements (Cl-) on the steel surface. Density Functional Theory (DFT) study confirmed the experimental results. © 2021 Universidade Federal de Sao Carlos. All rights reserved
  6. Keywords:
  7. Chlorine compounds ; Copper alloys ; Copper corrosion ; Corrosion inhibitors ; Density functional theory ; Hydrochloric acid ; Low carbon steel ; Morphology ; Adsorbed molecules ; Corrosion inhibition ; Corrosion inhibition performance ; Corrosive environment ; Electrochemical behaviors ; Inhibition mechanisms ; Organic films ; Tolyltriazoles ; Steel corrosion
  8. Source: Materials Research ; Volume 24, Issue 4 , 2021 ; 15161439 (ISSN)
  9. URL: https://www.scielo.br/j/mr/a/mWGC7wxgrpMVPHt5c4nnSRF/?lang=en