Corrosion tests were conducted on the material of copper base heat exchanger tubes (inhibited Admiralty). The tests used fresh water of the river Tajo, and included mass-loss measurements and analyses of the formed biofilms and of the corrosion and surface products. At the same time, the corrosion and biofouling processes were followed with electrochemical techniques. The analyses have shown a close correlation between the formed biofilms, the corrosion processes, the results of the mass-loss testing, the polarisation resistance and the electrochemical impedance spectroscopy.
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