Effect of nitrate on corrosion of austenitic stainless steel in boiling nitric acid solution containing chromium ions

Satoshi Hasegawa, Seong Yun Kim, Tetsunari Ebina, Haruaki Tokuda, Tatsuya Ito, Nobumichi Nagano, Keitaro Hitomi, Keizo Ishii

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

ABSTRACT: The oxidation behavior of chromium and the corrosion behavior of austenitic stainless steel in boiling nitric acid solution containing highly concentrated nitrates were investigated using UV-visible spectroscopic measurements, Raman spectral measurements, immersion tests, and potentiodynamic polarization measurements. The oxidation rate measurement of chromium from Cr(III) to Cr(VI) was performed by 1 M boiling nitric acid solution containing each highly concentrated nitrates: Al(NO 3 ) 3 , Nd(NO 3 ) 3 , Ca(NO 3 ) 2 , Mg(NO 3 ) 2 , and NaNO 3 as a simulant of uranium nitrate in uranium concentrator in reprocessing plants. As a result, the rate of chromium oxidation was different depending on the added nitrates even at the same nitric acid concentration. In addition, the oxidation rate of chromium was increased with increasing the calculated partial pressure of nitric acid in consideration of the hydration of cation of nitrates. Furthermore, the corrosion rate of type 310 stainless steel was accelerated by the solution having a high chromium oxidation rate containing nitrates. These results indicated that the acceleration of the corrosion rate in the solutions depending on the oxidation rate of chromium, and the rate is affected by the salt-effect of nitrates.

Original languageEnglish
Pages (from-to)1332-1341
Number of pages10
Journaljournal of nuclear science and technology
Volume53
Issue number9
DOIs
Publication statusPublished - 2016 Sep 1

Keywords

  • Stainless steel
  • chromium
  • corrosion
  • nitrate
  • nitric acid
  • reprocessing
  • salt-effect

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Fingerprint

Dive into the research topics of 'Effect of nitrate on corrosion of austenitic stainless steel in boiling nitric acid solution containing chromium ions'. Together they form a unique fingerprint.

Cite this