Effect of cathode polarization on copolymers of ethylene with vinyl acetate
The use of cathode polarization of a metal combined with insulation coatings (Ct) for protecting underground pipelines from corrosion permits prolonging their time in service to a significant degree. If the Ct exhibits local damage and the pipe undergoes cathode polarization in a conducting medium (for example, groundwater or moist soil), then peeling of the Ct occurs beginning with the edge of the damage. The behavior of copolymers of ethylene and vinyl acetate (CEVA) with a different concentration of vinyl acetate groups (12.33 and 45%) and some additives on a cathode-polarized support (on the cathode) was investigated. Electrochemical reductive decomposition (ECRD) of the copolymers was studied in an atmosphere of argon in dimethylformamide against a background of 0.05 mole/dm/sup 3/ N(C/sub 4/H/sub 9/)/sub 4/I. The occurrence of decomposition reactions was judged by the data from chronovoltammetry, gravimetry, IR spectroscopy, and differential thermal analysis.
- OSTI ID:
- 6082315
- Journal Information:
- J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 61:2; Other Information: Translated from Zh. Prikl. Khim.; 61: No. 2, 447-451(Feb 1988)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COPOLYMERS
ELECTROLYSIS
PIPELINES
CATHODIC PROTECTION
PROTECTIVE COATINGS
ACETATES
BINDING ENERGY
DECOMPOSITION
DIFFERENTIAL THERMAL ANALYSIS
DISSOCIATION
ELECTRIC POTENTIAL
ELECTRONS
EROSION
ETHYLENE
GRAVIMETRIC ANALYSIS
INFRARED SPECTRA
MATERIALS TESTING
MOLECULAR STRUCTURE
VALENCE
VOLTAMETRY
ALKENES
CARBOXYLIC ACID SALTS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COATINGS
CORROSION PROTECTION
ELEMENTARY PARTICLES
ENERGY
FERMIONS
HYDROCARBONS
LEPTONS
LYSIS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
SPECTRA
TESTING
THERMAL ANALYSIS
420205* - Engineering- Transport & Storage Facilities- (1980-)