Menu
Search
Filters
Close
Menu

96337 USE OF ELECTROCHEMICAL NOISE TO MONITOR MULTIPHASE FLOW AND CORROSION

Picture for 96337 USE OF ELECTROCHEMICAL NOISE TO MONITOR
Available for download
Product Number: 51300-96337-SG
ISBN: 96337 1996 CP
Author: Y. P. DEVA, M. GOPAL, W. P. JEPSON
Industry: Oil and Gas Production
$0.00
$20.00
$20.00
Electrochemical noise measurements were taken in a 7.5 cm diameter, 10 m long multiphase oiI/water/gas flow system. Full pipe flow studies were conducted for liquid velocities of 0,8, 1.0 and 1.5 ntis and slug flow for Froude numbers 4, 6, 9 and 12, using two phase (ASTM standard saltwater and carbon dioxide gas) and three phase (oil of 2cP viscosity. saltwater and gas) flow. The pressure was maintained at 134 KPa and temperature at 40 C. Noise data was measured with a Zero Resistance Ammeter and analyzed using software provided with the instrument. The noise fluctuations show trends which can be related to the type of 11ow. Full pipe flow studies show random fluctuations around the mean for both potential and current noise.This implies the occurrence of uniform corrosion. The Fast Fourier Transform (FFT) shows roll-off greater than -40 dB/decade in magnitude, characteristic of unifoml or general corrosion. In slug flow the potential noise fluctuations take the form of characteristic transients. The frequency of these transients correspond to the observed frequency of slugs. The FFT of this data shows roll-off slopes less than -20 dB/decade shown to be characteristic of pitting corrosion. A second slope of magnitude greater than -30 dB/decade is observed at higher frequencies and this might signify the presence of a second time constant controlling the corrosion reaction. This is due to the unique mechanisms associated with the mixing zone of slugs. Peaks in the Fast Fourier Transform (FFT) are also seen at particular frequencies. One of these corresponds to the slugging frequency. An increase in the percent change in standard deviation of current with Froude number implies enhanced corrosion activity on the surface of the electrode. The electrochemical noise technique is extremely useful for studying corrosion mechanisms and tlow parameters in multiphase flow pipelines. Its ability to isolate dynamic incidents and study them both in the time and frequency domain makes it a powerful tool for gaining an insight into mechanistic information on corrosion in multiphase pipelines. Keywords Electrochemical noise. horizontal multiphase flow, corrosion, slug ilow, pitting, localized corrosion, roll-off slope
Electrochemical noise measurements were taken in a 7.5 cm diameter, 10 m long multiphase oiI/water/gas flow system. Full pipe flow studies were conducted for liquid velocities of 0,8, 1.0 and 1.5 ntis and slug flow for Froude numbers 4, 6, 9 and 12, using two phase (ASTM standard saltwater and carbon dioxide gas) and three phase (oil of 2cP viscosity. saltwater and gas) flow. The pressure was maintained at 134 KPa and temperature at 40 C. Noise data was measured with a Zero Resistance Ammeter and analyzed using software provided with the instrument. The noise fluctuations show trends which can be related to the type of 11ow. Full pipe flow studies show random fluctuations around the mean for both potential and current noise.This implies the occurrence of uniform corrosion. The Fast Fourier Transform (FFT) shows roll-off greater than -40 dB/decade in magnitude, characteristic of unifoml or general corrosion. In slug flow the potential noise fluctuations take the form of characteristic transients. The frequency of these transients correspond to the observed frequency of slugs. The FFT of this data shows roll-off slopes less than -20 dB/decade shown to be characteristic of pitting corrosion. A second slope of magnitude greater than -30 dB/decade is observed at higher frequencies and this might signify the presence of a second time constant controlling the corrosion reaction. This is due to the unique mechanisms associated with the mixing zone of slugs. Peaks in the Fast Fourier Transform (FFT) are also seen at particular frequencies. One of these corresponds to the slugging frequency. An increase in the percent change in standard deviation of current with Froude number implies enhanced corrosion activity on the surface of the electrode. The electrochemical noise technique is extremely useful for studying corrosion mechanisms and tlow parameters in multiphase flow pipelines. Its ability to isolate dynamic incidents and study them both in the time and frequency domain makes it a powerful tool for gaining an insight into mechanistic information on corrosion in multiphase pipelines. Keywords Electrochemical noise. horizontal multiphase flow, corrosion, slug ilow, pitting, localized corrosion, roll-off slope
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 96290 NONBIOCIDAL CONTROL OF MICROBIOLOGICALLY
Available for download

96290 NONBIOCIDAL CONTROL OF MICROBIOLOGICALLY INFLUENCED CORROSION USING ORGANIC FILM-FORMING INHIBITORS

Product Number: 51300-96290-SG
ISBN: 96290 1996 CP
Author: Michael V. Enzien, Dan H. Pope, May M. Wu, Jim Frank
$20.00
Picture for 96325 COATING DISBANDMENT IN EPOXY-COATED
Available for download

96325 COATING DISBANDMENT IN EPOXY-COATED REINFORCING STEEL IN CONCRETE – FIELD OBSERVATIONS

Product Number: 51300-96325-SG
ISBN: 96325 1996 CP
Author: Alberto A. Sagues, Rodney G. Powers
$20.00
Picture for 96326 PERFORMANCE OF PLAIN AND GALVANIZED
Available for download

96326 PERFORMANCE OF PLAIN AND GALVANIZED REINFORCING STEEL DURING THE INITIATION STAGE OF CORROSION IN CONCRETE WITH POZZOLANIC ADDITIONS

Product Number: 51300-96326-SG
ISBN: 96326 1996 CP
Author: Rodney G. Powers, Eric I. Moreno, Alberto A. Sagues
$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