• 13Cr steel;
  • brine completion fluids;
  • bromine;
  • pitting corrosion;
  • salt

Corrosion behavior of 13Cr steel in aerated Br containing brine completion fluids at 150 °C was studied. A series of corrosion tests with different test duration of 7, 15, 30, and 60 days were performed in an autoclave to investigate the corrosion rate, morphology, and pitting evolution. Cross-sectional morphologies of the corrosion products were observed by scanning electron microscopy (SEM). Energy dispersive spectrum (EDS) was used to study the element distribution of the corrosion product inside the pits. The results showed that 13Cr steel emerged out of slight pitting corrosion, with the pitting growth rate of 0.04 mm/year. The pitting corrosion occurred after corroded 15 days, and the pits were filled with bromide salt. It is deduced that Br was involved in both the breakdown of the passive film and the expansion of the pits.