Influence of uranium on corrosion of stainless steel in solutions of fluoride in nitric acid

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Prot. Met. (Engl. Transl.); (United States)

OSTI ID:6323902

Kurtenov, M M

Stainless steels corrode rapidly in solutions of fluoride in nitric acid; the higher the fluoride ion content, the more intense is the corrosion. The activating effect of the fluoride ions mainly reduces to dissolution of the oxide films. Small amounts somewhat retard the cathodic reduction of HNO/sub 3/. In this report the authors provide the results of an investigation of the influence of uranium ions on the corrosion-electrochemical behavior of stainless steel 12Kh18N10T in solutions of up to 10 moles/liter of HNO/sub 3/, with fluoride ions up to 0.1 mole/liter. The authors conclude that the retardation of corrosion of stainless steel by uranium, zirconium and aluminum ions in solutions of fluorides in nitric acid is mainly due to the formation of strong complexes of these metals with fluorine ions, leading to a reduction of the number of free HF molecules in the solution. The stronger the complex of metal with fluorine, the higher the corrosion resistance of the stainless steel in a solution of fluoride in nitric acid.

• Research Organization: Omst. Inst. of Physical Chemistry, Academy of Sciences of the USSR
• OSTI ID: 6323902
• Journal Information: Prot. Met. (Engl. Transl.); (United States), Journal Name: Prot. Met. (Engl. Transl.); (United States) Vol. 21:1; ISSN PTNMA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ACTINIDE COMPOUNDS
ALLOYS
ALUMINIUM COMPOUNDS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
ELECTROCHEMICAL CORROSION
FLUORINE COMPOUNDS
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
NITRIC ACID
STAINLESS STEELS
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS
URANIUM COMPOUNDS
ZIRCONIUM COMPOUNDS