Tests spot inconsistencies predicting corrosion-inhibitor effectiveness

Laboratory experiments have shown that common techniques for determining corrosion on downhole tubulars give significantly different results.Weight loss and linear polarization rate measurements differed substantially in the corrosion rates determined as a function of corrosion inhibitor amount on bare steel and precorroded conditions.The study evaluated corrosion inhibitors' performances in gas wells producing water and gas containing C02 and H2S. It attributed the differences obtained to corrosion layers and to experimental limitations that hindered accurate corrosion measurements.Corrosion controlOne inconvenience in oil and gas production is the large cost of controlling corrosion...

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