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Report No.

Relation between redox reaction of vanadium and nitrogen oxide in nitric acid solution

Irisawa, Eriko ; Suzuki, Kazunori*; Kumagai, Mikio*; Kato, Chiaki   ; Ueno, Fumiyoshi  ; Abe, Hitoshi 

For the corrosion of stainless steels in the nitric acid solution containing oxidizing metallic ions, it is important factor that the relation between re-oxidation of metallic ions which is reduced with the corrosion reaction and the redox reaction of nitric acid. To make clear the effect of nitrogen oxides formed from nitric acid on oxidation behavior of tetravalent vanadium, changing of concentrations of nitrogen oxide discharged to gas phase from solution and nitrous acid in solution during oxidation reaction of vanadium were measured. The results showed that the nitrogen dioxide acted as oxidant on the oxidation reaction of vanadium.



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