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Corrosion and corrosion protection of steel pipes corrosion, in the field of transportation and distribution urban water grids is a particularly important economic factor in loss prevention, combating environmental pollution and economy. The corrosion rate of a metallic material depends on a number of factors such as the nature of the metal structure and the surface condition of the metal, the composition of the electrolyte (pH, dissolved oxygen content, the presence in the solution of corrosion inhibitors or accelerators), temperature, pressure, flow rate of the solution. Determination of the corrosion rate of OL37 carbon steel was achieved in synthetic hot water, using the weight loss method, in laboratory static and dynamic conditions.