Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

51313-02339-Aggressive Corrosion Associated with Salt Deposits in Low Water Content Sour Gas Pipelines

Picture for Aggressive Corrosion Associated with Salt Deposits in Low Water Content Sour Gas Pipelines
Available for download
Product Number: 51313-02339-SG
ISBN: 02339 2013 CP
Author: Wes Litke
Publication Date: 2013
$0.00
$20.00
$20.00

Low water volumes associated with gas production can lead to salt deposition under conditions that allow water evaporation to occur within a pipeline system. Salt deposits are capable of attracting water vapor from wet gas that has a water content well below the normal dew point. This phenomenon is related to the hygroscopic or deliquescent properties associated with individual salts present in the deposits. The relative humidity at which liquid water starts to accumulate at salt deposits is referred to as the deliquescence relative humidity (DRH). Both MgCl2 and CaCl2 have strong abilities to attract water and are typical components in gas line salt deposits. This means those components will attract water from the gas even if the water content is well below the theoretical dew point and form concentrated salt solutions. These concentrated brines lead to aggressive localized pitting corrosion. To better understand the contribution of deliquescence to the corrosion mechanism in gas pipelines where salt deposits can form a novel laboratory test method was developed to simulate the deliquescence phenomenon in gas pipelines. The performance of chemical corrosion inhibitors in this environment was also evaluated. This paper gives a brief explanation of DRH reports findings of this laboratory study and concludes that deliquescence is an integral part of the corrosion mechanism.

Keywords: localized corrosion salt deposits deliquescence corrosion inhibitors sour gas pipelines

Low water volumes associated with gas production can lead to salt deposition under conditions that allow water evaporation to occur within a pipeline system. Salt deposits are capable of attracting water vapor from wet gas that has a water content well below the normal dew point. This phenomenon is related to the hygroscopic or deliquescent properties associated with individual salts present in the deposits. The relative humidity at which liquid water starts to accumulate at salt deposits is referred to as the deliquescence relative humidity (DRH). Both MgCl2 and CaCl2 have strong abilities to attract water and are typical components in gas line salt deposits. This means those components will attract water from the gas even if the water content is well below the theoretical dew point and form concentrated salt solutions. These concentrated brines lead to aggressive localized pitting corrosion. To better understand the contribution of deliquescence to the corrosion mechanism in gas pipelines where salt deposits can form a novel laboratory test method was developed to simulate the deliquescence phenomenon in gas pipelines. The performance of chemical corrosion inhibitors in this environment was also evaluated. This paper gives a brief explanation of DRH reports findings of this laboratory study and concludes that deliquescence is an integral part of the corrosion mechanism.

Keywords: localized corrosion salt deposits deliquescence corrosion inhibitors sour gas pipelines

Product tags
Also Purchased
Picture for Pipeline Risk Assessment for the Purpose of ICDA in a Large Gas Gathering T&D System
Available for download

51313-02343-Pipeline Risk Assessment for the Purpose of ICDA in a Large Gas Gathering T&D System

Product Number: 51313-02343-SG
ISBN: 02343 2013 CP
Author: Nima Tajallipour
Publication Date: 2013
$20.00
Picture for Effect of pH on CO2 Corrosion at Elevated Temperatures
Available for download

51313-02348-Effect of pH on CO2 Corrosion at Elevated Temperatures

Product Number: 51313-02348-SG
ISBN: 02348 2013 CP
Author: Tanaporn Tanupabrungsun
Publication Date: 2013
$20.00
Picture for Assessing Interference Between Sacrificial Anodes on Anode Sleds
Available for download

51313-02344-Assessing Interference Between Sacrificial Anodes on Anode Sleds

Product Number: 51313-02344-SG
ISBN: 02344 2013 CP
Author: Tim Froome
Publication Date: 2013
$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