Interaction of sodium oleate with the surface of aluminum
The authors establish the nature of the adsorption of monolayers of Na oleate, determine their structure and composition, and determine the influence of modification of the Al surface and the time of its exposure in the solution on the adsorption of Na oleate. The data obtained are necessary for an understanding of the mechanism of the protective action of Na oleate as an inhibitor of the atmospheric corrosion of aluminum. After the exposure of aluminum to concentrated nitric acid, a layer consisting of oxides, nitrogen-containing salts, and aluminum hydroxides is formed on its surface. Modification on the surface accelerates the chemisorption of sodium oleate and the ion-exchange reaction in solution. In this case the chemisorption of sodium oleate increases the work function by 0.3 eV, while the formation of phase layers of aluminum oleate decreases it by 0.25 eV. In the case of analogous exposures in solution, the thickness of the aluminum oleate layers formed is greater on a modified surface.
- Research Organization:
- Institute of Physical Chemistry, Academy of Sciences of the USSR, Moscow
- OSTI ID:
- 5158607
- Journal Information:
- Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Journal Name: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States) Vol. 34:6, PT. 1; ISSN BACCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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ADSORPTION
ALKALI METAL COMPOUNDS
ALUMINIUM
AUGER ELECTRON SPECTROSCOPY
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHEMISORPTION
COATINGS
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSION RESISTANCE
ELECTRON SPECTROSCOPY
ELEMENTS
FUNCTIONS
INFRARED SPECTRA
ION EXCHANGE
MATERIALS TESTING
METALS
MONOCARBOXYLIC ACIDS
OLEIC ACID
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
PROTECTIVE COATINGS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SODIUM COMPOUNDS
SORPTION
SPECTRA
SPECTROSCOPY
TESTING
WORK FUNCTIONS