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Publication
A preliminary comparison of the corrosion behaviour of additively and conventionally manufactured 18Ni300 maraging steel for moulds
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Advisor(s)
Abstract(s)
ABSTRACT: The corrosion behaviour of a maraging steel 18Ni300 manufactured by Laser Powder Bed Fusion (L-PBF) was compared to that of a conventional tool steel. Electrochemical test conditions were chosen to approximate the corrosive environments encountered during injection moulding of polyvinyl chloride (PVC) parts. The corrosion behaviour of the steel produced by both routes was evaluated before and after an ageing treatment at 510 ºC for six hours. Cuboid specimens were fabricated and a polished area of 100 mm2 was immersed in a 0.1M HCl solution for 7 days. Open circuit potential (OCP) and polarization curves were used to monitor the material exposed to the corrosive environment. The obtained results indicate that the conventionally produced aged steel is less susceptible to corrosion and that the steel manufactured by L-PBF (not aged condition) showed better resistance to pitting.
Description
Keywords
Additive manufacturing Powder bed fusion Corrosion of moulds PVC
Citation
Ferreira, Daniel... [et.al.] - A preliminary comparison of the corrosion behaviour of additively and conventionally manufactured 18Ni300 maraging steel for moulds. In: Livro de Resumos : 8as Jornadas de Corrosão e Proteção de Materiais, Fórum Tecnológico, Lisboa, 24 novembro, 2022, p. 72-74
Publisher
LNEG - Laboratório Nacional de Energia e Geologia