EXAMINING ZINC OXIDE-CELLULOSE NANOPARTICLE COATINGS' CORROSION RESISTANCE ON MILD STEEL IN SODIUM CHLORIDE MEDIA

Authors

  • B.U. ANYANWU Mechanical Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.
  • S.O. OWOEYE Mechatronics Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.
  • O.O. OLAMIDE Mechanical Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.
  • K.L. OLAITAN Mechanical Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.
  • F.O. DURODOLA Mechatronics Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.
  • O.R, ADETUNJI Mechanical Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.
  • A.D. ANIBABA Mechanical Engineering Department, Federal University of Agriculture, Abeokuta, Nigeria.

Keywords:

Chloride, deposition, particles, substrates, corrosion

Abstract

Chloride-induced corrosion of mild steel is a major challenge in construction, automobile, agro-processing, oil and gas industries. When chloride ions come in contact with mild steel surfaces, they penetrate the oxide layer and react with the metal, leading to the formation of corrosion products such as iron chloride that accelerates its degradation and consequent failure in service. Structurally enhanced metallic oxides and biopolymers have been reported to hinder the penetration and progression of these ions to the base metals, when deposited on them. This study's objective was to use electro-deposition to apply zinc oxide-cellulose (xZnO-xCn) nanoparticle coatings to mild steel (the substrate) in order to increase corrosion resistance in sodium chloride media. Weight loss technique was used to determine the corrosion rates of the deposited coatings (samples). Optical and scanning electron microscopy was used to determine the samples' morphology. The corrosion rate values of all the coatings were observed lower than the substrate's, which was 5.0025 mm/y.  With the lowest corrosion rate value of 0.3127 mm/y, sample P8 (20gZnO-20gCn) demonstrated a 93% coating protection efficiency on the substrate. Sample P1 (20gZnO-5gCn) had the highest corrosion rate of 1.8954 mm/y and the highest protection efficiency of 62% among the coatings.  The surface of the substrates showed fine, uniformly distributed grains according to the coating morphologies. The study demonstrated that in the sodium chloride media, ZnO-cellulose nanoparticle coatings could create protective barriers on the substrate.

 

References

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Published

2025-02-21

Issue

Vol. 23 No. 1 (2024)

Section

Articles