Investigation of artificial pit growth in carbon steel in highly alkaline solutions containing 0.5M NaCl under oxic and anoxic conditions

Danyil Kovalov, Elmira Ghanbari, Feixiong Mao, Bruno Kursten, Digby D. Macdonald

Research outputpeer-review


We report an investigation of artificial pit growth (APG) in P355QL2 Grade Carbon Steel in the highly alkaline, synthetic concrete pore solution [sat. Ca(OH)2/NaOH of pH of 13.5] þ 0.5 M NaCl under both “oxic” and “anoxic” environmental conditions. The corrosion potential of the external surface, as well as the coupling currents flowing between the external surface and the pit tip and pit walls of the segmented
carbon steel specimens under the selected conditions, were measured as a function of time and pit aspect ratio. The findings were interpreted in terms of the Differential Aeration Hypothesis (DAH).
Original languageEnglish
Article number134554
Pages (from-to)1-8
Number of pages8
JournalElectrochimica Acta
StatePublished - 10 Oct 2019

Cite this