Corrosion of nickel-based alloys fabricated through additive manufacturing: a review

Traditionally manufactured nickel-based alloys (NiBA) are widely used for their high oxidation and corrosion resistance at extreme temperatures. Recently, additive manufacturing (AM) is being rapidly used to manufacture NiBA due to the ease of obtaining complex forms, low cost, and less waste generation. However, AM route makes NiBA vulnerable to corrosion and eventual failure. Yet, there is a lack of understanding of the effects of AM route on localized corrosion resistance in NiBA. This manuscript reviews the effects of various AM process parameters on the localized corrosion resistance of NiBA. Based on the data gathering and analysis, manufacturing steps for NiBA can be optimized for corrosion resistance. This review helps the community to understand the current and future needs in research and development in additive manufacturing of alloys.