Menu
Search
Filters
Close
Menu

51318-11065-On-line Real Time Electrochemical Corrosion Monitoring in Low Conductive Fluids – Sulfolane Aromatic Extraction

Picture for On-line Real Time Electrochemical Corrosion Monitoring in Low Conductive Fluids – Sulfolane Aromatic Extraction
Available for download

Results from studies on corrosion measurement in low conductive, sulfolane-based solutions are presented in this paper. Sulfolane is commonly used in petrochemical processes for extraction of aromatic compounds including benzene, toluene or xylenes.

Product Number: 51318-11065-SG
Author: Slawomir Kus / Sridhar Srinivasan / Kwei Meng Yap / Hui Li / Violetta Kozik / Andrzej Bak / Paulina Dybal
Publication Date: 2018
Industry: Corrosion Monitoring and Control
$0.00
$20.00
$20.00

Electrochemical corrosion monitoring techniques such as Linear Polarization Resistance (LPR), Electrochemical Noise (ECN) or Harmonic Analysis are widely recognized for their responsiveness and accuracy for determination of instantaneous corrosion rate. However, field application has generally been limited by the need for a conductive / aqueous process environment. This limitation stems from the fact that electrochemical systems cannot provide reliable readings in media at conductance levels less than 10 µS/cm due to significant impact of solution resistance on measured values of total resistance. Recent progress in multi-technique electrochemical systems involving low frequency impedance and harmonic distortion analysis has been shown to overcome this limitation.

Results from studies on corrosion measurement in low conductive, sulfolane-based solutions are presented in this paper. Sulfolane is commonly used in petrochemical processes for extraction of aromatic compounds including benzene, toluene or xylenes. Sulfolane systems, if contaminated by traces of oxygen and at typical process conditions (170-180ºC), may lead to sulfolane decomposition and formation of corrosive by-products. Significant corrosion of steel in Sulfolane applications has been reported, primarily in the reboiler-regenerator section. Considering that conductance of sulfolane mixtures varies from 2 to 5 µS/cm, it is obvious that traditional electrochemical monitoring approaches may fail due to extremely high solution resistance.

This paper details results from laboratory corrosion measurements in low conductivity, sulfolane-based fluids utilizing multi-technique electrochemical monitoring. Corrosion measurements conducted on sulfolane showed the importance of proper adjustment of electrode surface area for obtaining of reliable corrosion readings. It has been shown that industrial-type corrosion monitoring has capability for rapid detection of corrosivity in low-conductive, sulfolane-based fluids. Impact of temperature and sulfolane contaminants (oxygen, chlorides) on corrosion of mild carbon steel has also been studied.

Key words: on-line corrosion monitoring, electrochemical techniques, sulfolane, aromatic extraction

Electrochemical corrosion monitoring techniques such as Linear Polarization Resistance (LPR), Electrochemical Noise (ECN) or Harmonic Analysis are widely recognized for their responsiveness and accuracy for determination of instantaneous corrosion rate. However, field application has generally been limited by the need for a conductive / aqueous process environment. This limitation stems from the fact that electrochemical systems cannot provide reliable readings in media at conductance levels less than 10 µS/cm due to significant impact of solution resistance on measured values of total resistance. Recent progress in multi-technique electrochemical systems involving low frequency impedance and harmonic distortion analysis has been shown to overcome this limitation.

Results from studies on corrosion measurement in low conductive, sulfolane-based solutions are presented in this paper. Sulfolane is commonly used in petrochemical processes for extraction of aromatic compounds including benzene, toluene or xylenes. Sulfolane systems, if contaminated by traces of oxygen and at typical process conditions (170-180ºC), may lead to sulfolane decomposition and formation of corrosive by-products. Significant corrosion of steel in Sulfolane applications has been reported, primarily in the reboiler-regenerator section. Considering that conductance of sulfolane mixtures varies from 2 to 5 µS/cm, it is obvious that traditional electrochemical monitoring approaches may fail due to extremely high solution resistance.

This paper details results from laboratory corrosion measurements in low conductivity, sulfolane-based fluids utilizing multi-technique electrochemical monitoring. Corrosion measurements conducted on sulfolane showed the importance of proper adjustment of electrode surface area for obtaining of reliable corrosion readings. It has been shown that industrial-type corrosion monitoring has capability for rapid detection of corrosivity in low-conductive, sulfolane-based fluids. Impact of temperature and sulfolane contaminants (oxygen, chlorides) on corrosion of mild carbon steel has also been studied.

Key words: on-line corrosion monitoring, electrochemical techniques, sulfolane, aromatic extraction

Product tags
Also Purchased
Picture for Application of Indirect Condition Assessment Techniques for Buried Water Pipelines: A Case Study
Available for download

51318-11064-Application of Indirect Condition Assessment Techniques for Buried Water Pipelines: A Case Study

Product Number: 51318-11064-SG
Author: Mersedeh Akhoondan
Publication Date: 2018
$20.00

Indirect assessment techniques (special over-the-line potential and soil corrosivity surveys) were applied on an electrically discontinuous effluent sewer land outfall. Critical areas were excavated and direct assessment performed.  Mitigation methods were recommended.
Picture for 51318-11059- Review of a UNS N04400 Heat Exchanger Tube Failure in Cooling Water Service
Available for download

51318-11059- Review of a UNS N04400 Heat Exchanger Tube Failure in Cooling Water Service

Product Number: 51318-11059-SG
Author: Mel Esmacher / Kumar Kembaiyan / Tony Navarrete / Andrew Rentsch
Publication Date: 2018
$20.00

A polyethylene unit experienced a gas leak within a high pressure tube and shell heat exchanger. Failure analysis revealed that the tube wall loss was beneath residual deposits. Preventative measures and improvements in inspection & cleaning procedures are discussed.

 

 
Picture for The Performance Effect of Coating Rusty Steel with an Epoxy-Amine Coating
Available for download

51318-11067-The Performance Effect of Coating Rusty Steel with an Epoxy-Amine Coating

Product Number: 51318-11067-SG
Author: Mike O’Donoghue / Vijay Datta / Carl Reed
Publication Date: 2018
$20.00

Compares the accelerated corrosion performance of an alkylated phenolic polyamine cured epoxy coating applied to abrasive blasted steel (NACE 1/SSPC-SP5) to the same application on substrates allowed to rust.
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