Kinetics of self-assembled layer formation on iron

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Abstract

Chemical surface modification of iron by 1-phosphono-alkane derivatives in aqueous solution has been studied by EIS. The phosphonate layer formation in time was followed by the change of polarization resistance and interfacial capacitance values of iron substrate. Significant corrosion protection was observed due to the spontaneous adsorption layer formation. The protective layer is supposed to have a continuous and dense structure. The inhibition mechanism is anodic type, hindering the active iron dissolution to a large extent. The kinetics of phosphonate layer formation is a complex process. Beside the fast adsorption of molecules on bare iron surface, ordering in the layer structure is taking place during long immersion time. The layer formation process of alkane-diphosphonates and monophosphonates were compared.

Original languageEnglish
Pages (from-to)2335-2340
Number of pages6
JournalElectrochimica Acta
Volume47
Issue number13-14
DOIs
Publication statusPublished - May 25 2002

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Keywords

  • Alkane-diphosphonates
  • Kinetics
  • Layer formation
  • Monophosphonates

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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