MECHANISM AND KINETICS OF INTERNAL CORROSION OF PIPELINES OF HEATING SYSTEMS
The assessment of the mechanism and kinetics of process of corrosion of steel pipelines of thermal networks is presented. It is shown that availability of oxygen and free carbonic acid is the reason of corrosion. Oxygen leads to formation of oxides of iron which carry out different functions in relation to corrosion kinetics. Free carbonic acid only slows down process of formation of a protective film on cathodic sites. At low concentration of carbonic acid its action is not shown. The kinetics of corrosion is provided by value of a hydrogen indicator.