ABSTRACT
It was proved that strain Lactobacillus delbrueckii B5 synthezied exopolysaccharides in the presence of different amounts of lactose(5 to 15%).The obtained information was used in a study treating the anticorrosive properties of exopolysaccharides synthesized by the latter strain. The study of the corrosive stability of steel samples was conducted on the gravimetrique method. The rate of corrosion, the degree of protection, and coefficient of protection has been calculated. A microscope pictures of the treated steel samples confirmed the corrosive activity.