Question

How corrosion is affected by volatile nature of products of corrosion?

Answer 1

The reaction of cobalt with 1 pct Cl2 in 1,10, and 50 pct O2/Ar atmospheres has been studied at 650 °C with thermogravimetry and mass spectrometry. The principal vapor species appear to be CoCl2 and CoCl3. In all cases, CoCl2 (s) forms at the oxide/metal interface and equilibration of the volatile chlorides with Co3O4 does not occur in the early stages of the reaction. In the 1 pct C12-1 pct O2-Ar case, continuous volatilization occurs. In the 1 pct C12-10 pct O2-Ar and 1 pct C12-50 pct O2-Ar cases, volatilization occurs only in the first few minutes of reaction. Afterwards, the reaction is predominantly oxidation....



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Answer 2

Explanation:

refer to the attachment