[Effect of corrosion inhibitor on the producing of exopolymer complex by sulphate-reducing bacteria].

It is established that the specific productivity of exopolymer complex (EPM) synthesized by the cells of sulphate-reducing bacteria in a biofilm was 1.5 times higher than in plankton. A sharp increase of the specific productivity of EPM in the biofilm is observed when corrosion inhibitor is introduced in the environment. The inhibitor concentration being 1.0 g/l, the biofilm cells produced almost 18 times more of EPM than the bacteria cells in plankton. It is shown that the film exopolymers include glucose, galactose, mannose, xylose, ribose and three nondetermined sugars, while plankton cells also include rhamnose. Rhamnose appeared in the biofilm EPM composition and rhamnose, arabinose and fucose appeared in EPM of plankton cells as affected by the inhibitor. A necessity of investigating the biofilm formation for developing the methods of anticorrosive protection is discussed.