Influence of benzimidazole derivatives on corrosion and electrochemical behavior of iron

Journal Article · Sat Mar 01 00:00:00 EST 1986 · Prot. Met. (Engl. Transl.); (United States)

OSTI ID:5573708

Makovei, G L; Keris, L D; Kurmakova, I N

The authors study the relation of the ..pi..-electron density of the molecules of benzimidazole and its derivatives and their inhibiting effect in hydrochloric acid. The compositions of the derivatives of synthesized benzimidazole were verified by ultimate analysis and IR spectroscopy. The ..pi..-electron densities were calculated on a computer. It was found that the introduction of a proton increases the charge re-distribution in the imidazole and benzene rings, with practically no change in the charge on the substituents. The efficiency of inhibition of corrosion was studied by the gravimetric and potentiodynamic methods. To elucidate the limiting stages of cathodic evolution of hydrogen and anodic solution of the metal, the authors recorded polarization curves for steel St3 without additive and with 20 mM benzimidazole, 1-(alpha-acetoxy)ethylbensimidazole and 1-acetylbenzimidazole. The polarization curves for various concentrations of benzimidazole and its derivatives in the pH range 0-2 and a calculation of the characteristics of the cathodic evolution of hydrogen suggest that the limiting stage of the process is delayed discharge.

• Research Organization: Chernigou Branch, Polytechnic Institute, Kiev
• OSTI ID: 5573708
• Journal Information: Prot. Met. (Engl. Transl.); (United States), Vol. 21:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CORROSION INHIBITORS
MATERIALS TESTING
IMIDAZOLES
IRON
CORROSION PROTECTION
ELECTROCHEMICAL CORROSION
CHARGE DISTRIBUTION
CORROSIVE EFFECTS
ELECTRON DENSITY
GRAVIMETRIC ANALYSIS
HYDROCHLORIC ACID
HYDROGEN
PH VALUE
POLARIZATION
POTENTIOMETRY
PROTONS
STAINLESS STEELS
ALLOYS
AZOLES
BARYONS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IRON ALLOYS
IRON BASE ALLOYS
METALS
NONMETALS
NUCLEONS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
STEELS
TESTING
TITRATION
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion