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Influence of polymeric and monomeric organic quaternary ammonium salts on cathodic evolution of hydrogen on nickel

Journal Article · · J. Appl. Chem. USSR (Engl. Transl.); (United States)
OSTI ID:5385239
;
The rate of metal corrosion with hydrogen depolarization is determined by the kinetics of cathodic evolution of hydrogen. It was shown earlier in a study of the influence of organic inhibitors on the overpotential n of cathodic evolution of hydrogen on iron that, depending on the adsorbability of the additives, not only the rate but also the mechanism of the cathode process varies. The decrease of the rate of the electrode reaction in presence of inhibitors is caused mainly by two factors: partial blocking of the metal surface, and production of an adsorption psi/sub 1/ potential. With assumption of linear variation of the psi/sub 1/ potential with increasing degree of surface coverage THETA of the electrode surface by the organic additive leads to the following expression for the retardation coefficient: ..gamma..=i/i/sub base/ =1//sub 1-THETA/exp(kTHETA), where i and i/sub base/ are the reaction rates in presence and absence (in the base electrolyte) of the inhibitor, and k is a proportionality factor.
OSTI ID:
5385239
Journal Information:
J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 54:4; ISSN JAPUA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION ISOTHERMS
AMINES
AMMONIUM COMPOUNDS
CHEMICAL REACTION KINETICS
CORROSION INHIBITORS
CORROSION PROTECTION
DATA
DIAGRAMS
ELEMENTS
EQUATIONS
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
ISOTHERM
KINETICS
METALS
NICKEL
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PH VALUE
POLARIZATION
QUATERNARY COMPOUNDS
REACTION KINETICS
SALTS
TRANSITION ELEMENTS