Menu
Search
Filters
Close
Menu

Adhesion Of Corrosion Product Layers Formed In Dewing Conditions

Picture for Adhesion Of Corrosion Product Layers Formed In Dewing Conditions
Available for download
Product Number: 51321-17007-SG
Author: Claudia Prieto; Bruce Brown; Marc Singer; David Young
Publication Date: 2021
$0.00
$20.00
$20.00

Engineers in the oil and gas industry frequently rely on the formation of protective corrosion product layers to mitigate internal pipeline corrosion. However, their protectiveness can be compromised if such layers, iron carbonate formed during CO2 corrosion for example, are mechanically removed from the metal. Partial loss of a corrosion product layer has the potential to result in localized attack and loss of containment. In sour environments, this partial loss can lead to particulate (black powder in case of commercial gas pipelines) entrainment, which can cause multiple problems downstream in the pipeline. Consequently, the study of adhesion forces between iron carbonate, iron oxide or iron sulfide layers and their associated metal substrate is
essential to the industry. In the current work, adherence characteristics of iron carbonate layers grown in dewing conditions (condensing water conditions) were mechanically characterized via scratch testing by measuring the critical force to produce a removal of the layer. With the use of critical frictional forces (tangential forces parallel to the surface that produce the removal of the corrosion product) and the projected area of the indenter, the shear stress associated with the removal of the layer was calculated. This mechanical assessment was extended to layers grown in bulk aqueous conditions for comparative purposes. The results indicated that the critical shear stress for the removal of iron carbonate in dewing conditions was 3 orders of magnitude lower than for iron carbonate grown in aqueous environments. Finally, the critical shear stress for iron sulfide produced in dewing conditions indicated that the layer was significantly more adherent than the iron carbonate layer grown in similar conditions. In addition to understanding corrosion phenomena, this work has significance relating to black powder formation and resultant erosion.

Engineers in the oil and gas industry frequently rely on the formation of protective corrosion product layers to mitigate internal pipeline corrosion. However, their protectiveness can be compromised if such layers, iron carbonate formed during CO2 corrosion for example, are mechanically removed from the metal. Partial loss of a corrosion product layer has the potential to result in localized attack and loss of containment. In sour environments, this partial loss can lead to particulate (black powder in case of commercial gas pipelines) entrainment, which can cause multiple problems downstream in the pipeline. Consequently, the study of adhesion forces between iron carbonate, iron oxide or iron sulfide layers and their associated metal substrate is
essential to the industry. In the current work, adherence characteristics of iron carbonate layers grown in dewing conditions (condensing water conditions) were mechanically characterized via scratch testing by measuring the critical force to produce a removal of the layer. With the use of critical frictional forces (tangential forces parallel to the surface that produce the removal of the corrosion product) and the projected area of the indenter, the shear stress associated with the removal of the layer was calculated. This mechanical assessment was extended to layers grown in bulk aqueous conditions for comparative purposes. The results indicated that the critical shear stress for the removal of iron carbonate in dewing conditions was 3 orders of magnitude lower than for iron carbonate grown in aqueous environments. Finally, the critical shear stress for iron sulfide produced in dewing conditions indicated that the layer was significantly more adherent than the iron carbonate layer grown in similar conditions. In addition to understanding corrosion phenomena, this work has significance relating to black powder formation and resultant erosion.

Also Purchased
Picture for 09007 Reliability on Coating Pull-off Adhesion Strength Test
Available for download

09007 Reliability on Coating Pull-off Adhesion Strength Test

Product Number: 51300-09007-SG
ISBN: 09007 2009 CP
Author: C. S. Shin, Yun Ho Baek, E. H. Song, S.M. Son, K. K. Baek and M.K. Chung
Publication Date: 2009
$20.00
Pull-Off Adhesion Testing of Coatings - Improve Your Technique
Available for download

Pull-Off Adhesion Testing of Coatings - Improve Your Technique

Product Number: 41215-893-SG
Author: JF Fletcher, DJ Barnes
Publication Date: 2015
$20.00

Pull-off adhesion testing is widely used to assess the protective coating process. It is also used to determine if a coating is fit for service in new construction and for repairs to existing structures. The result is often critical to the acceptance or rejection of a coating process, as the adhesion value quoted by the paint manufacturer can be adversely affected by aspects of the coating process. Low adhesion values are indicative of premature failure of the coating and are often due to inadequate surface preparation of the substrate. 
Picture for Corrosion Protection of Smooth Surfaces – Coating Adhesion
Available for download

51316-7518-Corrosion Protection of Smooth Surfaces – Coating Adhesion

Product Number: 51316-7518-SG
ISBN: 7518 2016 CP
Author: Catalina Hagen
Publication Date: 2016
$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