Suitability of nickel aluminium bronze alloy fabricated by laser powder bed fusion to be used in the marine environment
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Date
2023
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Abstract
Nickel aluminium bronze alloy specimens were produced using laser powder bed fusion (LPBF) and subjected to heat treatment to understand their corrosion behaviour when exposed to a 3.5 wt% NaCl solution. Electrochemical analysis, including impedance spectroscopy and polarization curves, was performed to characterize the samples after 30 days of immersion. The findings reveal that the as-built samples exhibit superior corrosion resistance compared to the heat-treated samples, primarily attributed to the lower presence of intermetallic phases, which hinder the alloy's passivation process.
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Keywords
Additive manufacturing, Electrochemical behaviour, Copper alloy, Impedance spectroscopy, Nickel aluminium bronze, Heat-treatment