Menu
Search
Filters
Close
Menu

10178 Correlation of Hydrogen Flux & Corrosion Rate Measurements Carried out During a Severe Episode of Corrosion-Erosion Attributable to Naphthenic Acid

Picture for 10178 Correlation of Hydrogen Flux & Corrosion Rate Measurements Carried out During a Severe Episode
Available for download
Product Number: 51300-10178-SG
ISBN: 10178 2010 CP
Author: Frank W.H. Dean, John M. O'Kane, John H. Harrison, Timothy F. Rudd and Stephen J. Powell
Publication Date: 2010
$0.00
$20.00
$20.00
Over a six month period, UT measurements at a matrix of measurement sites on a Fractionation column indicated that it was suffering from severe internal corrosion. It was decided to monitor hydrogen flux at all measurement points on a frequent basis. The resulting flux profiles broadly co-trended. Time averaged flux and longer term corrosion rates correlated well. In a more sophisticated treatment, flux data was converted into hydrogen activity at the corroding face, to compensate for hydrogen permeation through the steel, thus normalising any variations in steel temperature and thickness. Again the correlation of activity and shorter term corrosion rate was good, with a correlation factor that was closely comparable to that obtained from laboratory data. In short, the data illustrates that, at temperatures where naphthenic acid corrosion can take place, hydrogen flux may provide a keen indication of the corrosion rate in near real time, with the diffusive delay in flux stabilization upon a corrosive change typically being one hour.

Keywords: naphthenic acid corrosion, hydrogen flux, visbreaker
Over a six month period, UT measurements at a matrix of measurement sites on a Fractionation column indicated that it was suffering from severe internal corrosion. It was decided to monitor hydrogen flux at all measurement points on a frequent basis. The resulting flux profiles broadly co-trended. Time averaged flux and longer term corrosion rates correlated well. In a more sophisticated treatment, flux data was converted into hydrogen activity at the corroding face, to compensate for hydrogen permeation through the steel, thus normalising any variations in steel temperature and thickness. Again the correlation of activity and shorter term corrosion rate was good, with a correlation factor that was closely comparable to that obtained from laboratory data. In short, the data illustrates that, at temperatures where naphthenic acid corrosion can take place, hydrogen flux may provide a keen indication of the corrosion rate in near real time, with the diffusive delay in flux stabilization upon a corrosive change typically being one hour.

Keywords: naphthenic acid corrosion, hydrogen flux, visbreaker
Product tags
Also Purchased
Picture for Corrosivity Study of Sulphur Compounds and Naphthenic Acids under Refinery Conditions
Available for download

51316-7392-Corrosivity Study of Sulphur Compounds and Naphthenic Acids under Refinery Conditions

Product Number: 51316-7392-SG
ISBN: 7392 2016 CP
Author: Qin Xin
Publication Date: 2016
$20.00
Picture for 10353 Naphthenic Acid Corrosion of Mild Steel in the Presence of Sulfide Scales Formed in Crude Oil
Available for download

10353 Naphthenic Acid Corrosion of Mild Steel in the Presence of Sulfide Scales Formed in Crude Oil Fractions at High Temperature

Product Number: 51300-10353-SG
ISBN: 10353 2010 CP
Author: Gheorghe M. Bota, Dingrong Qu, Srdjan Nesic and Alan Wolf
Publication Date: 2010
$20.00
Picture for Safe Processing of Naphthenic Acid Opportunity Crudes Using Chemical Inhibition and Online Monitorin
Available for download

Safe Processing of Naphthenic Acid Opportunity Crudes Using Chemical Inhibition and Online Monitoring

Product Number: 51317--9067-SG
ISBN: 9067 2017 CP
Author: Jake Davies
Publication Date: 2017
$20.00

This paper provides an overview of the risk assessment methodology and how it is applied to assess and monitor the risks in conjunction with a rigorous corrosion monitoring program comprising of multiple ultrasonic sensor placements. Various case studies are presented.
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