What does this research mean for the field?

Dipping duration and acid type significantly influence the corrosion rate of Al 6061 hybrid nanocomposite, with the highest corrosion rate observed in hydrochloric acid. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

The research aims to understand how different exposure intervals affect the corrosion rates of Al 6061 hybrid nanocomposites.

March 5, 2026

Investigation of exposure interval on the corrosion activities of Al 6061 hybrid nanocomposite in the acidic immersion corrosion experiment

Key Points

The research aims to understand how different exposure intervals affect the corrosion rates of Al 6061 hybrid nanocomposites.
Manufactured Al 6061 MMC using 0.6 wt.% SiC and 0.2 wt.% B₄C via ultrasonic-aided stir casting.
Evaluated corrosion performance in various acidic media at different immersion times using Taguchi L9 orthogonal array.
Measured density and microhardness to assess structural integrity and enhancement.
Corrosion rate was highest in hydrochloric acid and decreased with longer immersion times due to passive layer formation.
Vicker’s microhardness of the hybrid nanocomposite was significantly higher than the raw alloy.
Nanoparticles improved the density of the Al 6061 alloy.

Abstract

This learning optimized corrosion determinant for Corrosion Rate (CR) of Aluminum (Al) 6061 base matrix alloy, strengthened by 0.6 wt.% Silicon Carbide (SiC) in addition with 0.2 wt.% Boron Carbide (B₄C) hybrid nano Metal Matrix Composite (MMC) manufactured using ultrasonic-aided stir casting. Nanoparticles raised the density of the Al 6061 alloy from 2.687 to 2.698 g/cm3. The Vicker’s microhardness for hybrid nano MMC was 63.795 HV, which is 18% greater than the base raw Al 6061 alloy. The metallurgical investigation confirmed the presence and dispersion of green variety of SiC and higher hardness B₄C nanoparticles in the MMC, which produced intermetallic phases. Corrosion performance was evaluated in Sulphuric acid (H2SO2), Nitric acid (HNO3) and Hydrochloric acid (HCl) acidic media at fluctuating dipping periods using a Taguchi L9 orthogonal array. Results showed that dipping durations and acid type significantly influenced the CR. The CR was uppermost in HCl and diminished with longer soaking due to passive layer formation.

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Investigation of exposure interval on the corrosion activities of Al 6061 hybrid nanocomposite in the acidic immersion corrosion experiment

Key Points

Abstract

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