TITLE

AISI 304 L stainless steel decontamination by a corrosion process using cerium IV regenerated by ozone Part I: Study of the accelerated corrosion process

AUTHOR(S)
Caire, J.P.; Laurent, F.; Cullie, S.; Dalard, F.; Fulconis, J.M.; Delagrange, H.
PUB. DATE
August 2003
SOURCE
Journal of Applied Electrochemistry;Aug2003, Vol. 33 Issue 8, p703
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper describes the study of a new decontamination process of AISI 304L stainless steel from dismantled nuclear power plants. A very thin active contaminated surface layer was stripped from the underlying metal by corrosion in a solution of nitric acid with the addition of cerium nitrate. The Ce4+/Ce3+ concentration ratio was initially equal to unity and ozone/oxygen bubbles were used to regenerate Ce3+ ions into Ce4+ ions. The study was performed in a laboratory cell prior to preliminary optimization in a three-litre reactor. The objective was to obtain a corrosion rate of about 10 micrometers per day. This target was reached in 10-2 mol l-1 of cerium nitrate with bubbling of a 1.56 g h-1 ozone flow in a 60 l h-1 total gas flow. The corrosion rate depended essentially on the Ce4+ concentration. The stainless steel exhibited intergranular corrosion. The corrosion rate was monitored by measuring the solution oxidizing potential using a precious metal electrode.
ACCESSION #
16781789

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics