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Author Kurtenov, M. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ FLUORINE COMPOUNDS ♦ CORROSIVE EFFECTS ♦ NITRIC ACID ♦ STAINLESS STEELS ♦ CORROSION RESISTANCE ♦ ELECTROCHEMICAL CORROSION ♦ URANIUM COMPOUNDS ♦ ALUMINIUM COMPOUNDS ♦ MATERIALS TESTING ♦ ZIRCONIUM COMPOUNDS ♦ ACTINIDE COMPOUNDS ♦ ALLOYS ♦ CHEMICAL REACTIONS ♦ CHROMIUM ALLOYS ♦ CORROSION ♦ CORROSION RESISTANT ALLOYS ♦ HALOGEN COMPOUNDS ♦ HYDROGEN COMPOUNDS ♦ INORGANIC ACIDS ♦ IRON ALLOYS ♦ IRON BASE ALLOYS ♦ STEELS ♦ TESTING ♦ TRANSITION ELEMENT COMPOUNDS 360105* -- Metals & Alloys-- Corrosion & Erosion
Abstract 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.
Educational Use Research
Learning Resource Type Article
Publisher Date 1985-09-01
Publisher Place United States
Journal Prot. Met.
Volume Number 21
Issue Number 1
Organization Omst. Inst. of Physical Chemistry, Academy of Sciences of the USSR


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