Microelectrochemical heterogeneity of ferric-pearlitic structures

E. M. Gutman, I. E. Zamostyanik, G. V. Karpenko

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Using a method developed for other investigations [1], we studied the distribution of electrode potentials on the surface of a microsection of St. 20 steel annealed in vacuum for 10 hr at 1200°C. To increase the resolving power of the microelectrochemical method used, we increased the H2O2 concentration in the electrolyte [1]. This not only increased the concentration of iron ions in the immediate vicinity of the electrodes but also enriched the solution with hydroxyl ions which promoted extensive hydrolysis of FeCl3 leading to the formation of Fe(OH)3 which passed into a colloidal state and gave no reaction for iron ions. As a result, a passivating film was formed on the specimen surface so that it was impossible to carry out potential measurements. We therefore changed the composition of the electrolyte: sulfuric acid was introduced instead of hydrochloric acid.

Original languageEnglish
Pages (from-to)406-407
Number of pages2
JournalSoviet Materials Science
Issue number4
StatePublished - 1 Jul 1972
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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