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

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

Research output: Contribution to journalArticle

37 Citations (Scopus)

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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Copper corrosion
Seawater
Surface morphology
Cooling
Caustics
Protective coatings
Copper
Energy dispersive spectroscopy
Activation energy
Metals
Polarization
Adsorption
Scanning electron microscopy
Temperature
diphosphoric acid

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Inhibition of copper corrosion in cooling seawater under flowing conditions by novel pyrophosphate. / Deyab, M. A.; Essehli, Rachid; El Bali, B.

In: RSC Advances, Vol. 5, No. 79, 2015, p. 64326-64334.

Research output: Contribution to journalArticle

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