Flow assisted corrosion of API 5L X-70 in sour brine induced by pipe flow changes in a jet impingement chamber

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Abstract

The corrosion behavior of API 5L X-70 pipe steel was studied in a jet impingement chamber, which
simulated the effect of flow rate and contact angle on pipe accessories. Experiments were carried out in
sour brine with kerosene and corrosion rates were determined by linear polarization resistance.
Corrosion products were characterized by scanning electron microscopy and X-ray diffraction to
identify crystalline phases on surface. Parameters under study included flow rate (1.05, 2.36 m/s) and
contact angles (30°, 60°, 90°). Highest flow rates were associated to top corrosion rates due to
corrosion product detachment on which prevailed that of oxide type, whilst moderate flow rate and
static conditions led to a larger number of phases on which sulfides predominated over oxides.
Original languageEnglish
Pages (from-to)9849-9862
JournalInternational Journal of Electrochemical Science
Volume10
Publication statusPublished - 4 Nov 2015

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