Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

Understanding Carbon Steel Corrosion and Inhibition in Deep Pit-Like Features Under Thick Deposit Layers

Picture for Understanding Carbon Steel Corrosion and Inhibition in Deep Pit-Like Features Under Thick Deposit Layers
Available for download

Corrosion of carbon steel is the most prominent reason for pipeline failure in a range of industries, from oil and gas transportation to water treatment facilities and nuclear waste storage. Under-deposit corrosion occurs in low fluid flow rate environments, when particulate matter (such as sand and clay) settles on the bottom of transportation pipelines. The presence of deposits results in a diffusion barrier, which significantly alters interfacial solution chemistry compared with that of the bulk.

Product Number: 51323-19284-SG
Author: Raeesa Bhamji, Frederick Pessu, Joshua Owen, Richard Barker
Publication Date: 2023
$0.00
$20.00
$20.00

Under-deposit corrosion of carbon steel is a major issue in many industries, leading to pipeline failure. In environments with low fluid flow rates, inert matter settles and accumulates on the bottom of pipelines, leading to localized corrosion. Large pit-like features can be detected under the deposits but limited understanding exists surrounding the use of chemical corrosion inhibitors in stifling their growth. In this study, a bespoke test setup has been used to evaluate the performance of different inhibitor chemistries in stifling the corrosion of deep pit-like features under thick (< 8 mm) inert deposit layers. Potentiodynamic
polarization and electrochemical impedance spectroscopy measurements were used to assess the corrosion profile of X65 carbon steel at recession depths of 0 mm and 9 mm in 2 wt.% NaCl brine, under CO2-saturated conditions, at 50 °C. Galvanic corrosion in the presence of corrosion inhibitors was measured via a zero-resistance ammeter. 2-mercaptoethanol was able to reduce corrosion rates in the presence of inert silicone dioxide deposit layers. In contrast, an imidazoline derivative was considerably less effective under the same conditions. Scanning electron microscopy was used for visual assessment of surface damage after 20 hours of corrosion.

Under-deposit corrosion of carbon steel is a major issue in many industries, leading to pipeline failure. In environments with low fluid flow rates, inert matter settles and accumulates on the bottom of pipelines, leading to localized corrosion. Large pit-like features can be detected under the deposits but limited understanding exists surrounding the use of chemical corrosion inhibitors in stifling their growth. In this study, a bespoke test setup has been used to evaluate the performance of different inhibitor chemistries in stifling the corrosion of deep pit-like features under thick (< 8 mm) inert deposit layers. Potentiodynamic
polarization and electrochemical impedance spectroscopy measurements were used to assess the corrosion profile of X65 carbon steel at recession depths of 0 mm and 9 mm in 2 wt.% NaCl brine, under CO2-saturated conditions, at 50 °C. Galvanic corrosion in the presence of corrosion inhibitors was measured via a zero-resistance ammeter. 2-mercaptoethanol was able to reduce corrosion rates in the presence of inert silicone dioxide deposit layers. In contrast, an imidazoline derivative was considerably less effective under the same conditions. Scanning electron microscopy was used for visual assessment of surface damage after 20 hours of corrosion.

Product tags
Also Purchased
Picture for UNDER DEPOSIT CORROSION (UDC) IN THE OIL AND GAS INDUSTRY: A REVIEW OF MECHANISMS TESTING AND MITIG
Available for download

51312-01379-UNDER DEPOSIT CORROSION (UDC) IN THE OIL AND GAS INDUSTRY: A REVIEW OF MECHANISMS TESTING AND MITIG

Product Number: 51312-01379-SG
ISBN: 01379 2012 CP
Author: Jose Vera
Publication Date: 2012
$20.00
Picture for Materials Selection for Use in Hydrochloric Acid
Available for download

51316-7680-Materials Selection for Use in Hydrochloric Acid

Product Number: 51316-7680-SG
ISBN: 7680 2016 CP
Author: Ajit Mishra
Publication Date: 2016
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support