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Corrosion rates of low porosity AM S31603 and AM N06210 in several kinds of acidic solutions were similar to those of wrought alloys respectively, the corrosion rates of AM S31603 and AM N06210 became higher with increasing porosity of each specimen.
Additive manufacturing is a method to manufacture 3D shape of resin or metal. Searching proper manufacturing condition and evaluating mechanical property and microstructure of Titanium-base, Cobalt-base, Nickel-base alloys and stainless steel for the fields such as aerospace, medical and defense field have been progressed. However, there are not many reports about corrosion and oxidation resistance of these alloys especially, there are a few reports about their corrosion resistance in acidic solutions. In this study, high and low porosity specimens of additively manufactured (AM) alloys of UNS+ N06210 and UNS S31603 were prepared intendedly with the selective laser melting (SLM) method. The high and low porosity specimens of AM N06210 and AM S31603 were immersed in several kinds of acidic solutions to estimate their corrosion rate and understand the dependency of the corrosion properties of those on porosity. The paper reveals that corrosion rates of low porosity AM S31603 and AM N06210 in several kinds of acidic solutions were similar to those of wrought alloys respectively, the corrosion rates of AM S31603 and AM N06210 became higher with increasing porosity of each specimen.
Key words: Additive manufacturing, Corrosion, Localized corrosion, N06210, S31603, Sulfuric acid, Hydrochloric acid, hydrofluoric acid
The main scope of this work is to explore different process configurations to understand the corrosion response of additive manufactured alloys and to suggest the parameters to be controlled for future qualification in sour environment.
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Additive manufacturing can manufacture components that were previously impossible - without compromising strength, ductility and corrosion resistance. The pitting corrosion resistance of a selective laser melted Nickel alloy has been evaluated by electrochemical methods.
Pitting failure boundary of duplex stainless steel under sour condition was investigated by electrochemical and immersion tests. Polarization measurements investigate the effect of temperature and H2S on the corrosion behavior.