The initiation of single corrosion sites on iron by focused laser illumination

Richard K. Ulrich, Richard C. Alkire

Research output: Contribution to journalArticlepeer-review


An experimental method has been developed for selective depassivation of small regions on an otherwise passive metal surface with the use of a focused laser radiation. A nitrogen pumped dye laser provided a pulsed beam which was focused to a diameter of approximately 5 μm. The method was used to create corrosion sites on iron immersed in a solution of 0.1 M Na2B4O7 containing NaCl in the range of 0.01 to 0.03 M. It was found that the corrosion rate was controlled by transport through a covering of corrosion products which precipitated over the site. The corrosion current from single sites increased with the square root of time, and with a proportionality factor that depended upon both the applied potential and chloride ion concentration.

Original languageEnglish (US)
Pages (from-to)1153-1162
Number of pages10
JournalCorrosion Science
Issue number11
StatePublished - 1983

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science


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