Physico-chemical analyses and corrosion effect of produced water on low carbon steel

Abstract

The corrosion effect of produced water on low carbon has been investigated using the weight loss technique. The composite produced water sample was found to contain pH (5.3), turbidity (82 NTU), conductivity (8920 Ns/cm), salinity (2394 mg/L), total iron (1.28 mg/L), carbonate (140 mg/L), nitrate (42.74 mg/L) and suphate (nil mg/L). At an exposure time in hours of 120, 240, 360, 480, 600, and 720, the corresponding calculated corrosion rates in many of the coupons were 0.077, 0.153, 0.204, 0.345, 0.352, and 0.370 respectively. Physico-chemical characteristics of the composite produced water sample used for the study has a higher concentration compared with DPR standard for discharge of produced formation water into surface environment.
It was assumed that the corrosion of the coupons was due to presence of high chemical matters in the produced water sample.

Keywords: corrosion, produced water, environment, rock, salinity, dissolved oxygen.

Global Journal of Pure and Applied Sciences Vol. 11(4)2005: 511-515