A preliminary comparison of the corrosion behaviour of additively and conventionally manufactured 18Ni300 maraging steel for moulds

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 ch...

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Bibliographic Details
Main Author: Ferreira, Daniel (author)
Other Authors: Ferro Rocha, Alexandre (author), Proença, Carla Sofia (author), Bastos, A.C. (author), Oliveira, Filipe (author), Oliveira, Jose Martinho (author)
Format: conferenceObject
Language:eng
Published: 2022
Subjects:
Additive manufacturing
Powder bed fusion
Corrosion of moulds
PVC
Online Access:http://hdl.handle.net/10400.9/3956
Country:Portugal
Oai:oai:repositorio.lneg.pt:10400.9/3956
Description
Summary: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.

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