Menu
Search
Filters
Close
Menu

96006 THE FORMATION OF PROTECTIVE FeCO3 CORROSION PRODUCT LAYERS IN CO2 CORROSION

Picture for 96006 THE FORMATION OF PROTECTIVE FeCO
Available for download
Product Number: 51300-96006-SG
ISBN: 96006 1996 CP
Author: E. Van Hunnik, B.F.M. Pots and E. L.J.A. Hendriksen
$0.00
$20.00
$20.00
Current models often over-predict CO2 corrosion rates for wet gas and oil transport systems. One of the main reasons for this is the fact that the formation of corrosion product scales is not properly taken into account. An evaluation of in-house and literature experiments has been carried out to develop an equation for iron carbonate precipitation kinetics. Modelling the kinetics of this precipitation process offers a number of applications in the area of corrosion prediction and control. The ultimate goal of the work is to establish the conditions under which stable, protective corrosion product layers form. A good indicator for the formation was found to be the so-called scaling tendency, which is defined as the ratio between the precipitation and corrosion flux. To form reliable scales, the bulk scaling tendency should be high enough for protective film formation and the local scaling tendency, in case of film damage, should be high enough for film repair. Both processes have been modelled and it was found that above approximately 80 °C reliable scales are often easily formed whereas below this temperature, pH values of at least 6 are required. The precipitation model also results in improved prediction of the solution pH which allows better corrosion rate descriptions even if the scales are not protective. In some cases the changes in pH may lead to reductions of 40% in the predicted corrosion rates. Other applications of iron carbonate precipitation modelling are also discussed. Keywords: carbon dioxide corrosion, corrosion prediction, iron carbonate precipitation, scale repair, supersaturation, scaling tendency.
Current models often over-predict CO2 corrosion rates for wet gas and oil transport systems. One of the main reasons for this is the fact that the formation of corrosion product scales is not properly taken into account. An evaluation of in-house and literature experiments has been carried out to develop an equation for iron carbonate precipitation kinetics. Modelling the kinetics of this precipitation process offers a number of applications in the area of corrosion prediction and control. The ultimate goal of the work is to establish the conditions under which stable, protective corrosion product layers form. A good indicator for the formation was found to be the so-called scaling tendency, which is defined as the ratio between the precipitation and corrosion flux. To form reliable scales, the bulk scaling tendency should be high enough for protective film formation and the local scaling tendency, in case of film damage, should be high enough for film repair. Both processes have been modelled and it was found that above approximately 80 °C reliable scales are often easily formed whereas below this temperature, pH values of at least 6 are required. The precipitation model also results in improved prediction of the solution pH which allows better corrosion rate descriptions even if the scales are not protective. In some cases the changes in pH may lead to reductions of 40% in the predicted corrosion rates. Other applications of iron carbonate precipitation modelling are also discussed. Keywords: carbon dioxide corrosion, corrosion prediction, iron carbonate precipitation, scale repair, supersaturation, scaling tendency.
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 96004 ROLE OF CONDUCTIVE CORROSION PRODUCTS
Available for download

96004 ROLE OF CONDUCTIVE CORROSION PRODUCTS ON THE PROTECTIVENESS OF CORROSION LAYERS

Product Number: 51300-96004-SG
ISBN: 96004 1996 CP
Author: Jean-Louis Crolet, Nicolas Thevenot, Srdjan Nesic
$20.00
Picture for 96011 PREDICTION OF CORROSIVITY OF CO2/H2S
Available for download

96011 PREDICTION OF CORROSIVITY OF CO2/H2S PRODUCTION ENVIRONMENTS

Product Number: 51300-96011-SG
ISBN: 96011 1996 CP
Author: Sridhar Srinivasan, Russell D. Kane
$20.00
Picture for 96003 ELECTROCHEMICAL PROPERTIES OF IRON
Available for download

96003 ELECTROCHEMICAL PROPERTIES OF IRON DISSOLUTION IN THE PRESENCE OF CO2 - BASICS REVISITED

Product Number: 51300-96003-SG
ISBN: 96003 1996 CP
Author: Srdjan Nesic, Nicolas Thevenot, Jean-Louis Crolet, Dragutin M. Drazic
$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