| Summary: | SUMMARY
INHIBITORS INFLUENCE ON THE STEEL CORROSION PRODUCTS
Kristina Saulėnienė
Graduation thesis for Master degree has been carried out at the department of Chemistry of Vilnius Pedagogical University and at the Institute of Chemistry
Research adviser: prof. habil. dr. R. Ramanauskas
Concrete normally provides reinforcing steel with exellent means of protection against corrosion, while carbon dioxide and chlorides penetrate through the pores of the concrete and catalyse the steel corrosion. The most effective inhibitors of the steel corrosion in alkaline environment are the nitrites (anodic inhibitors which help to form more solid oxide film), therefore in this scientific work their influence on the steel corrosion products (oxides) was researched.
Fe oxides were formed by anodic polarization of steel in the alkaline solution and then analised influence of the chloride ions and nitrites to their formation. For electrochemical measurement the solution of 0,1 M NaOH was chosen, because its pH (12,6) is almost the same as one of the electrolyte being found in the pores of concrete. The measurements of the polarization curves were started after the reduction of the oxide film of the electrode surface, e.g. starting the spreading of the potentials from the negative values (~ -1,2 V Ag/AgCl).
Analysing the influence of the chloride ions on the steel polarization in the alkaline environment, we were interested in the amounts of the forming Fe (II) and Fe (III) oxides, which... [to full text]
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