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Engineering
Materials and Chemical Engineering
Supercritical CO2 erosion protection
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[QUOTE="Baluncore, post: 6490912, member: 447632"] Depending on the sCO[sub]2[/sub] application there will be other chemical reactants and contaminants in the mix that may cause corrosion, followed by erosion of those compounds. The problem with stainless steel is due to it's surface of chromium oxide. It is only stainless in the presence of oxygen, without excess oxygen any sulfur will turn it to a black crumb. It is difficult to coat an oxidised surface with a protective metal layer, without first removing the oxide. Hard chrome on stainless steel will simply form another stable chromium oxide like the original surface of stainless steel, so it will probably not make much difference. Maybe you could consider ceramics, or a surface treatment with materials like carbides that are hard and do not react with any component of the soup. Take a look at the materials used for metal cutting tools. Iridium electroplating worked well on fountain pen nibs. Maybe it will work with sCO[sub]2[/sub]. The question becomes, what base metal do you employ? [/QUOTE]
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Supercritical CO2 erosion protection
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