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10277 Localized Corrosion on Carbon Steel in Sour Glycolic Solutions

Picture for 10277 Localized Corrosion on Carbon Steel in Sour Glycolic Solutions
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Product Number: 51300-10277-SG
ISBN: 10277 2010 CP
Author: J. Kvarekval, A Dugstad, M. Seiersten
Publication Date: 2010
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Results from joint industry projects (JIP) on corrosion in sour wet gas pipelines with hydrate preventers (glycols) are presented and discussed. Experiments were run in flow loops and glass cell equipment with 0.1-5 bar CO2, 0.1-5 bar H2S and temperatures in the range of 15-90oC. Salinity and pH were also adjusted to simulated different operating conditions. It was found that alkaline chemical treatment for corrosion control (pH stabilization) was inefficient against localized sour corrosion above 0.1 bar H2S, and in some cases even promoted localized attacks.

Keywords: Corrosion, carbon steel, pitting, CO2, H2S, iron sulfide, pH-stabilization
Results from joint industry projects (JIP) on corrosion in sour wet gas pipelines with hydrate preventers (glycols) are presented and discussed. Experiments were run in flow loops and glass cell equipment with 0.1-5 bar CO2, 0.1-5 bar H2S and temperatures in the range of 15-90oC. Salinity and pH were also adjusted to simulated different operating conditions. It was found that alkaline chemical treatment for corrosion control (pH stabilization) was inefficient against localized sour corrosion above 0.1 bar H2S, and in some cases even promoted localized attacks.

Keywords: Corrosion, carbon steel, pitting, CO2, H2S, iron sulfide, pH-stabilization
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Periodic cleaning of sales gas lines often yields large quantities of material known as black powder. This paper describes a research study that was conducted to provide estimates for corrosion rates of carbon steel in TEG-water mixtures with TEG content in the range 0.0 wt% to 99.5 wt%.
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