A new corrosion inhibitor was developed for application in sour gas and oil production. During
the development process, controlling pitting corrosion in laboratory testing was important for
quantifying inhibitor performance. This criterion was set because pitting or localized corrosion
is the most significant internal corrosion threat in sour gas production. Evaluation of the
corrosion inhibitor in the laboratory testing used vertical scanning interferometry (VSI) to image
the exposed coupons and localized corrosion monitoring to quantify localized corrosion. At the
end of the development stage a field trial was set up in an oilfield with production consistent
with the conditions the inhibitor was exposed to in laboratory testing.