Published September 1999 | Version v1
Journal article Metadata-only

On the inhibition of intergranular corrosion of austenitic stainless steels in highly oxidizing solutions

Creators

  • 1. GNTs RF Nauchno-Issledovatel'skij Fiziko-Khimicheskij Inst., Moscow (Russian Federation)

Description

Patterns of tetrafluoroborate dope effect (when it is injected into HNO3+Cr(4) solutions separately or together with phosphate) on the uniform and intercrystalline corrosion of chromium-nickel austenite stainless steels depending on their chemical and phase composition and on concentration of nitric acid and Cr(4) in a solution are determined. The possibility of abrupt (by an order of 2-3) increase of corrosion resistance of steels in highly-oxidizing media via combined injection of phosphate and tetrafluoroborate dopes in the solution is shown. Optimum concentrations of these dopes resulting in corrosion maximum inhibition are determined

Abstract (Russian)

Выявлены закономерности влияния добавок тетрафторбората (при его введении в растворы HNO3+Cr(4) раздельно или совместно с фосфатом) на равномерную и межкристаллитную коррозию хромникелевых аустенитных нержавеющих сталей в зависимости от их химического и фазового состава, а также концентрации азотной кислоты и Cr(4) в растворе. Показана возможность резкого (в десятки - сотни раз) повышения коррозионной стойкости сталей в сильноокислительных средах путем совместного введения в раствор добавок фосфата и тетрафторбората. Определены оптимальные концентрации этих добавок, приводящие к максимальному ингибированию коррозии

Additional details

Additional titles

Original title (Russian)
Об ингибировании межкристаллитной коррозии аустенитных нержавеющих сталей в сильноокислительных средах

Publishing Information

Journal Title
Zashchita Metallov
Journal Volume
35
Journal Issue
5
Journal Page Range
p. 504-508
ISSN
0044-1856
CODEN
ZAMEA9

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
31020351
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
AQUEOUS SOLUTIONS; BORON COMPOUNDS; CHEMICAL COMPOSITION; CHEMICAL REACTION KINETICS; CHROMIUM COMPOUNDS; CHROMIUM-NICKEL STEELS; CONCENTRATION RATIO; CORROSION INHIBITORS; CORROSION PROTECTION; CORROSION RESISTANCE; INTERGRANULAR CORROSION; NITRIC ACID; PHASE STUDIES; POTASSIUM FLUORIDES; POTASSIUM PHOSPHATES
Descriptors DEC
ALKALI METAL COMPOUNDS; ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CORROSION; DISPERSIONS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HIGH ALLOY STEELS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; KINETICS; MIXTURES; NICKEL ALLOYS; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; POTASSIUM COMPOUNDS; REACTION KINETICS; SOLUTIONS; STAINLESS STEELS; STEELS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
30 refs., 4 figs., 5 tabs.