1-Phenyl-1H-tetrazol as corrosion inhibitor for pipeline steel in sulfuric acid solution

Shiying Tao

Research output: Journal PublicationArticlepeer-review

Abstract

1-Phenyl-1H-tetrazol (PHT) has been studied as an efficient corrosion inhibitor for X65 steel in sulfuric acid corrosion environment. Atomic force microscope test results show that PHT can effectively inhibit the corrosion of X65 steel in 0.5 M sulfuric acid solution. Quantum chemical calculations and molecular dynamics simulations show that PHT has a small energy gap value and a large dipole moment value, which is an excellent corrosion inhibitor. In addition, the adsorption of PHT on the Fe(110) surface adopts parallel adsorption and a large binding energy value, which shows that PHT can effectively inhibit the corrosion of X65 steel. Potentiodynamic polarization test results show that as the PHT concentration increases, the value of the corrosion current density decreases significantly. When the PHT concentration is 1 mM, the corrosion inhibition efficiency can reach 92.1%. In addition, the adsorption of PHT on the surface of X65 steel conforms to Langmuir adsorption, and the adsorption process is spontaneous.
Original languageEnglish
Pages (from-to)210335
JournalInternational Journal of Electrochemical Science
Volume16
Issue number3
DOIs
Publication statusPublished - Mar 2021

Keywords

  • AFM
  • Corrosion inhibitor
  • Molecular dynamics simulation
  • Quantum chemical calculation
  • X65 steel

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