The corrosion of single pits on stainless steel in acidic chloride solution

Richard C. Alkire, Kai P. Wong

Research output: Contribution to journalArticlepeer-review

Abstract

A new method was developed for creating single corrosion pits on Type 304 stainless steel surfaces that otherwise exhibit very low dissolution rates. Single pits were grown by masking specimens with photoresist except for a region of 100 μm diameter, and then exposing them to 1 N H2SO4 and 0.1 N NaCl at 0.6 V (SCE). By measurement of current and surface area during pit growth, it was found that the dissolution current density decreases with the square root of time. These results support quantitatively the hypothesis that the corrosion rate is controlled by dissolution of an Fe SO4 salt film.

Original languageEnglish (US)
Pages (from-to)411-421
Number of pages11
JournalCorrosion Science
Volume28
Issue number4
DOIs
StatePublished - 1988

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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