Arabian Journal of Chemistry (Dec 2021)

Microbiologically-influenced corrosion of the electroless-deposited NiP-TiNi – Coating

  • Eman M. Fayyad,
  • P. Abdul Rasheed,
  • Noora Al-Qahtani,
  • Aboubakr M. Abdullah,
  • Fatma Hamdy,
  • Mohammed A. Sharaf,
  • Mohammad K. Hassan,
  • Khaled A. Mahmoud,
  • Adel M. Mohamed,
  • George Jarjoura,
  • Zoheir Farhat

Journal volume & issue
Vol. 14, no. 12
p. 103445

Abstract

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In this study, we reveal the microbiologically influenced corrosion (MIC) behavior of the new electroless NiP-TiNi nanocomposite coating in simulated seawater using the electrochemical impedance spectroscopy (EIS) technique after different periods of incubation time (7, 10, 14, 21, 28 days) in a sulfate-reducing bacteria (SRB) medium. The biofilm formation and the corrosion products were characterized using the scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The EIS results revealed the carbon steel (CS)/NiP-TiNi and NiP-TiNi/SRB biofilm interfaces' characteristics after different incubation times in the SRB media. EIS measurements revealed that the NiP-TiNi nanocomposite coating's MIC resistances are superior relative to API X80 carbon steel and a TiNi-free NiP coating, with ∼93% of corrosion inhibition efficiency after 28 days of incubation.

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