Abstract
Nickel-based alloys are usually used for a wide range of applications like petrochemical processing, oil and gas extraction, marine engineering and high temperature applications in power generation industry e.g., heat exchangers or turbine blades due to their excellent corrosion resistance and good mechanical properties. Nickel-based alloys are designed to resist high loading and severe corrosive environments during operations. The aim of this study is to investigate the effect of depositing copper nanoparticles of different sizes on top of the surface of different nickel-based alloys (e.g.alloys 825, 625 and 276) on their corrosion behavior in different electrolytes of different pH values and chloride and sulfide ions concentrations. The study included, electrochemical and non-electrochemical characterization techniques. Also, the surfaces of the corroded alloys were checked using optical and scanning electron microscopy, energy dispersive x-ray and atomic force microscopy.
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