Corrosion Protection Of Industrial Cooling Water Systems By Using New Organic Polymers As Inhibitors

摘要

New organic compounds were obtained by radicalic polymerization using the microwave energy. These new polymers were used as scaling and corrosion inhibitors in cooling waters systems. It is well known that, in all the cases of cooling water systems, at the metal/water surface contact appear frequent corrosion processes, which determine deposition of corrosion products, like scales. Due to these scales formation from the decomposition of bicarbonates and in the same time, of the corrosion products on the heat exchange surfaces, the exchange heat becomes more difficult, fact that disturbs the normal function of the industrial installation. The addition of these new organic inhibitors offers protection by forming an adsorption organic barrier film at the metal surface. Electrochemical measurements and metallographic examinations were used to assess the relevant physical properties of the new corrosion inhibitors. The addition of the organic inhibitors led in all the cases to inhibition of the corrosion rate. The organic compounds used are adsorbed on the carbon steel surface according to a Langmuir isotherm.rnThe inhibition process was attributed to the formation of the adsorbed film on the metal surface that protects the metal against corrosive agents. The E1S measurements have confirmed this protection and pointed out the formation of adsorption layers on the electrode surface.