Published May 2010
The protection of lubricants from microbiologycal damage
G.B.BabayevaThe survey of native and foreign literature and experience of works, conducted in the Institute of Chemistry of Additives and other scientific Institutions testify that many lubricants in the process of transportation and especially in storage are damaged by microorganisms. By using hydrocarbons of lubricants as the single source of energy, microorganisms change the composition of emulsion and cause the pollution by their products. The cause of lubricant damage is oxidative and hydrolytic activity of the lipolytic ferments formed by microorganisms of lubricants. The products of lubricant metabolism are hydrogen sulfide and hydrocarbon gas. Hydrocarbon causes unpleasant smell, sludge of microbic slimes and biofouling are formed. Concentration of emulsion pH is changed; detergent and lubricating properties are getting worse and lubricants life become short. Among the existing methods of lubricants more effective is the chemical method which means the use of chemical compounds with antimicrobic properties. Conformities of microbiological damage of lubricants were investigated, changes of lubricants by microorganisms were described, the methods of protection from microbiological damage by special additives were considered and names of well-known industrial biocides for lubricants with their active components were given.
