A study of the anticorrosion properties of carbonate deposits to protect low-carbon steel from the action of tap water |
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| Authors: | G S Vasyliev Yu S Gerasimenko S K Poznyak L S Tsybulskaya |
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| Institution: | 1. Kiev Polytechnic Institute National Technical University of Ukraine, pr. Peremohy 37, b. 4, Kiev, 03056, Ukraine
2. Research Institute for Physical Chemical Problems, Belarussian State University, ul. Leningradskaya 14, Minsk, 220030, Belarus
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| Abstract: | Effect of electrochemically injected magnesium ions on the process in which carbonate deposits are formed on a corrodible surface of low-carbon steel in water of heat-and-water supply systems was studied. It was found that the anticorrosion efficiency of the deposit, evaluated by the polarization-resistance method and voltammetry, is approximately 1.5 times that of natural deposits formed in the absence of injected magnesium ions. X-ray diffraction analysis with grazing beam incidence, scanning electron microscopy, and energy-dispersive analysis demonstrated that mostly dense polycrystalline calcium carbonate deposits with a structure of aragonite are formed in the presence of magnesium ions. The mechanism by which a protective CaCO3 layer grows on the corrodible surface of low-carbon steel is discussed. |
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