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In general, copper is highly reactive with sulphur and its chemical compounds.

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in Casting-Forming-Welding II by (119k points)
In general, copper is highly reactive with sulphur and its chemical compounds.

(a) True

(b) False

The question was asked in an interview for job.

My enquiry is from Copper Alloys in portion Foundry Introduction & Materials of Casting-Forming-Welding II

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by (701k points)
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Correct option is (a) True

The best I can explain: Copper may resists the oxidation, but it is highly reactive with sulphur and its chemical compounds, it produces copper sulphide during the reaction which can be unpleasant for the casting components. The main copper contaminants significantly are phosphorous and iron besides oxygen.

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