Effect of corrosion products and turbulent flow on inhibition efficiency of propargyl alcohol on AISI 1018 mild carbon steel in 4 M hydrochloric acid

The role of corrosion products formed by pre-corrosion of AISI 1018 mild carbon steel on the efficiency of the polymerizable corrosion inhibitor propargyl alcohol in 4 M HCl at 80 °C under laminar and turbulent flow conditions was studied. Propargyl alcohol is less efficient on the pre-corroded stee...

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Bibliographic Details
Published in:Corrosion science 2017-07, Vol.123, p.170-181
Main Authors: Barmatov, Evgeny, Hughes, Trevor L.
Format: Article
Language:English
Subjects:
Carbon steel
Cementite
Corrosion
Corrosion effects
Corrosion inhibitors
Corrosion products
Dosage
Fluid dynamics
Hydrochloric acid
Hydrolysis
Laminar flow
Low carbon steels
Polymerization
Propargyl alcohol
Studies
Turbulence
Turbulent flow
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Summary:The role of corrosion products formed by pre-corrosion of AISI 1018 mild carbon steel on the efficiency of the polymerizable corrosion inhibitor propargyl alcohol in 4 M HCl at 80 °C under laminar and turbulent flow conditions was studied. Propargyl alcohol is less efficient on the pre-corroded steel than on freshly ground specimens due to the presence of corrosion products, such as cementite (Fe3C) and a C-rich phase formed by acid hydrolysis of cementite. The adverse effect of pre-corrosion can be suppressed by proper optimization of the inhibitor composition and the inhibitor dosage.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2017.04.020