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Effect of F/sup -/, H/sub 2/PO/sub 4//sup -/, and SO/sub 4//sup - -/ on pitting corrosion of steel 1Kh18N10T in chloride--nitrate solutions

Journal Article · · Prot. Met. (USSR) (Engl. Transl.); (United States)
OSTI ID:7091959
;
The experiments were carried out in unbuffered 1N KCl + 0.5N KNO/sub 3/ solution with addition of KF, KH/sub 2/PO/sub 4/, and K/sub 2/SO/sub 4/ at 30 to 90/sup 0/. Fluoride ions (0.1 to 0.3N) did not affect the critical pitting potentials for steel 1Kh18N10T, but did impair passivity at a potential in excess of 800 mV. Anodic potentiodynamic curves are shown for KF and H/sub 2/PO/sup -//sub 4/; the i--tau relationship is also shown for the latter. Addition of SO/sub 4//sup 2 -/ in a concentration up to 0.5N does not affect phi/sub in/ at the temperatures studied and shifts phi/sub p/ for the steel toward more positive values to some extent. 3 figures, 1 table. (RWR)
Research Organization:
State Inst. of the Nitrogen Industry, Severodonetsk, USSR
OSTI ID:
7091959
Journal Information:
Prot. Met. (USSR) (Engl. Transl.); (United States), Journal Name: Prot. Met. (USSR) (Engl. Transl.); (United States) Vol. 12:1; ISSN PINMA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALLOYS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
ELECTROMOTIVE FORCE
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MEDIUM TEMPERATURE
NICKEL ALLOYS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORIC ACID
PHOSPHORUS COMPOUNDS
PITTING CORROSION
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
POTASSIUM FLUORIDES
POTASSIUM NITRATES
POTASSIUM PHOSPHATES
POTASSIUM SULFATES
STAINLESS STEELS
STEELS
SULFATES
SULFUR COMPOUNDS
TITANIUM ADDITIONS
TITANIUM ALLOYS