Enhanced Corrosion Resistance of Fe 500 Steel Rebars via Electroless Ni–P–MWCNT Composite Coating

Author(s)	Mr. ABHIMANYU KUMAR
Country	India
Abstract	This paper examines the impact of adding the ideas of multi-walled carbon nanotubes (MWCNTs) in a Ni–P metal matrix coating to enhance the corrosion behavior of steel. This composite coating was produced by the electroless deposition method. X-ray diffraction (XRD) was used to determine structural characteristics and Vickers microhardness was used to measure mechanical behavior. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods were used to investigate the corrosion behavior of the uncoated steel and Ni–P coated and the MWCNT-reinforced Ni–P coated samples. The corrosion potentials of the bare steel, Ni-P coating and Ni-P-MWCNT composite coating were determined as -470 mV, -428 mV and -342 mV, respectively. The interferometry of MWCNT-incorporated coating was observed to inhibit the substrate by 26.82 % as compared to the bare substrate, but the Ni–P coating interferometry improved by 14.63 % as compared to the plain steel. The above findings clearly indicate that MWCNT reinforced Ni P composite coating has a better corrosion resistance than the plain Ni P coating, and Fe 500 steel substrate.
Keywords	MWCNT; Electroless deposition; Vickers microhardness; Electrochemical impedance spectroscopy; potentiodynamic polarization.
Field	Engineering
Published In	Volume 8, Issue 1, January-February 2026
Published On	2026-02-27
DOI	https://doi.org/10.36948/ijfmr.2026.v08i01.70145

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