Chemical passivation of ferrous materials in presence of salts of phosphonic acids

A. Veres, G. Reinhard, E. Kálmán

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The influence of salts of various phosphonic acids on the chemical passivation of pure iron and mild steel in neutral aqueous solutions by dissolved oxygen has been investigated. Using open circuit potential measurements, current density-potential curves, and impedance spec¬troscopy it is shown that chemical passivation is not attainable in the presence of phosphon-ates. Moreover, the passive state of iron or steel surfaces in air saturated sodium benzoate solution can be destroyed by phosphonates.

Original languageEnglish
Pages (from-to)147-150
Number of pages4
JournalBritish Corrosion Journal
Issue number2
Publication statusPublished - Jan 1 1992


ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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