The rates of hydrogen evolution and iron corrosion in H2SO4 containing the bio-organic compounds, purine, its derivatives (aminopurine, mercaptopyrazopyrimidine, aminomethylmercaptopurme and aminopurinethiol) and thymine have been examined. Purine and aminopurine were found to be inhibitors of iron corrosion while the others were corrosion accelerators. The corrosion rates of iron in the presence of the ring substituted purines followed a linear free energy relationship. The corrosion rate decreased with increase in the electron density at the adsorption center.

Subject
Chemical compounds, Corrosion currents, Corrosion rate, Hydrogen evolution, Adsorption, Sodium chloride, Iron, Mixtures, Constants, Corrosion inhibitors, Immersion, Accelerators, Chemical reactions
© 1979 National Association of Corrosion Engineers
1979
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