Suitability of nickel aluminium bronze alloy fabricated by laser powder bed fusion to be used in the marine environment.

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. • NAB produced via AM exhibit lower corrosion current densities than thr heat-treated. • The microstructure and corrosion behavior of NAB is significantly influenced by fabrication methods and heat treatment. [ABSTRACT FROM AUTHOR]