The isotherm slope. A criterion for studying the adsorption mechanism of benzotriazole on copper in sulphuric acid

D M Bastidas, P P Gomez, E Cano

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The adsorption of benzotriazole (BTA) on copper surfaces in 0.001, 0.005 and 0.01 M concentrations of sulphuric acid was investigated using gravimetric measurements. BTA was tested in concentrations from 1X10(-5) to 1x10(-1) M at temperatures from 298 to 328 K. The adsorption mechanism is discussed in terms of applicability of the conventional Frumkin, Bockris-Swinkels and Kastening-Holleck isotherms, among others. The best fit was obtained using the Frumkin isotherm model. The projected molecular area of BTA was calculated to elucidate inhibitor orientation in the adsorption process.

Original languageEnglish
Pages (from-to)98-106
Number of pages9
JournalRevista de Metalurgia
Volume41
Publication statusPublished - Mar 2005

Keywords

  • copper
  • sulphuric acid
  • benzotriazole
  • adsorption isotherm
  • objective function
  • projected molecular area
  • CORROSION-INHIBITOR
  • HYDROCHLORIC-ACID
  • MILD-STEEL
  • EQUATION

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