Inhibition of copper corrosion in cooling seawater under flowing conditions by novel pyrophosphate

M. A. Deyab, Rachid Essehli, B. El Bali

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Abstract

The inhibition of copper corrosion in cooling seawater by novel pyrophosphate SrNiP<inf>2</inf>O<inf>7</inf> (SNP) was investigated under flowing conditions using mass-loss and electrochemical methods. The surface morphology was characterized by SEM coupled with EDX spectra. Comparable results show that SNP acts as a mixed-type inhibitor with predominantly cathodic effectiveness, suppressing the corrosive process by physical adsorption on the copper surface. The highest inhibition efficiency obtained from mass-loss, polarization and EIS measurements are 92.7%, 94.8% and 97.1%, respectively, at 120 mg L<sup>-1</sup> of SNP. The influence of increasing temperature on SNP inhibitor efficiency has been studied, and the activation energy has been calculated. Surface morphology observations evidenced the formation of a protective SNP film over the metal surface.

Original languageEnglish
Pages (from-to)64326-64334
Number of pages9
JournalRSC Advances
Volume5
Issue number79
DOIs
Publication statusPublished - 2015

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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