Accession Number : AD0479104


Title :   MECHANISM OF MICROBIOLOGICAL CONTAMINATION OF JET FUEL AND DEVELOPMENT OF TECHNIQUES FOR DETECTION OF MICROBIOLOGICAL CONTAMINATION. PART II. THE ROLE OF MICROORGANISMS IN ALUMINUM CORROSION, EMULSION FORMATION, SLUDGE FORMATION AND SEALANT DEGRADATION


Descriptive Note : Interim summary rept. no. 1, 1 Jan-31 Dec 1964


Corporate Author : MELPAR FALLS CHURCH VA


Personal Author(s) : Blanchard, Gordon C ; Goucher, Charles R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/479104.pdf


Report Date : Feb 1966


Pagination or Media Count : 102


Abstract : Progress has been made in defining the role that microorganisms can play in the processes of aluminum alloy corrosion, emulsion formation, sludge formation, and sealant and topcoat degradation during the oxidation of jet fuel hydrocarbons for growth. It was demonstrated that bacteria can cause aerobic aluminum alloy corrosion by changing the ionic composition of the growth medium, by growth in proteinaceous media, and by bringing about corrosion in media containing electron mediators coupled to cell metabolism. Fractionation of growth media made corrosive by microorganisms growing on fuel has yielded two particularly corrosive fractions; one fraction contains cations and the other fraction contains colored organic compounds. Fungi caused corrosion by concentrating corrosive metals, i.e., copper and iron, in their mycelium. This metal reacted with aluminum when organisms were deposited upon it. Fungi also caused corrosion by their ability to penetrate coatings, thus exposing the aluminum to corrosive growth media.


Descriptors :   *JET ENGINE FUELS , *FUEL CONTAMINATION , DETECTION , DETECTORS , CORROSION , DEGRADATION , ALUMINUM ALLOYS , TEST METHODS , CORROSION INHIBITION , METAL COATINGS , BIOLOGICAL CONTAMINATION , OXIDATION , CHEMICAL REACTIONS , FUNGI , CONTAMINATION , COLLOIDS , DECOMPOSITION , SEALING COMPOUNDS , CONCENTRATION(CHEMISTRY) , MICROBIOLOGY , MICROORGANISMS , FUEL ADDITIVES , FUNGUS DETERIORATION


Subject Categories : Biology
      Microbiology
      Fuels


Distribution Statement : APPROVED FOR PUBLIC RELEASE