Search
Filters
Close

08538 Experimental and Theoretical Investigation of the Uniform Corrosion in the Annulus of Offshore Flexible Pipelines

Product Number: 51300-08538-SG
ISBN: 08538 2008 CP
Author: E. Remita, B. Tribollet, E. Sutter, F. Ropital, J. Kittel, C. Taravel-Condat, and N. Desamais
Publication Date: 2008
$0.00
$20.00
$20.00
Flexible pipelines used in the offshore industry are composed of steel wires enclosed in an annulus formed by inner and outer thermoplastic sheaths. The CO2 corrosion of the carbon steel wires located in this annulus occurs within restricted volumes of electrolyte. For instance, the typical V/S ratio between the volume of electrolyte and the exposed steel surface is in the order of 0.03 mL.cm-2. In such confined environments, corrosion measurements clearly show that the results classically obtained in bulk conditions (infinite electrolyte volume) do not remain valid. Thus, the corrosion rates measured in the annulus conditions are commonly 2 or 3 orders of magnitude lower than those predicted by classical CO2 corrosion models. Moreover, measured pH is significantly higher than the saturation pH predicted by thermodynamic models such as CORMED. Recently, large progresses have been made in the understanding of the uniform corrosion processes in the annulus of offshore flexible pipelines. These progresses, related to the design of innovative experimental setups, the achievement of an important testing program and the development of new theoretical models are reported in the present paper.
Flexible pipelines used in the offshore industry are composed of steel wires enclosed in an annulus formed by inner and outer thermoplastic sheaths. The CO2 corrosion of the carbon steel wires located in this annulus occurs within restricted volumes of electrolyte. For instance, the typical V/S ratio between the volume of electrolyte and the exposed steel surface is in the order of 0.03 mL.cm-2. In such confined environments, corrosion measurements clearly show that the results classically obtained in bulk conditions (infinite electrolyte volume) do not remain valid. Thus, the corrosion rates measured in the annulus conditions are commonly 2 or 3 orders of magnitude lower than those predicted by classical CO2 corrosion models. Moreover, measured pH is significantly higher than the saturation pH predicted by thermodynamic models such as CORMED. Recently, large progresses have been made in the understanding of the uniform corrosion processes in the annulus of offshore flexible pipelines. These progresses, related to the design of innovative experimental setups, the achievement of an important testing program and the development of new theoretical models are reported in the present paper.
Product tags
Also Purchased
Picture for 03113 HIGH STRENGTH METALLIC MATERIALS
Available for download

03113 HIGH STRENGTH METALLIC MATERIALS FOR FLEXIBLE PIPES SPECIFIC ENVIRONMENTS AND CORROSION BEHAVIOUR

Product Number: 51300-03113-SG
ISBN: 03113 2003 CP
Author: F. Dupoiron, C. Taravel-Condat
$20.00
Picture for Corrosion Testing of Steel Armour Wires in Flexible Pipes—A Parametric Study
Available for download

51315-5829-Corrosion Testing of Steel Armour Wires in Flexible Pipes—A Parametric Study

Product Number: 51315-5829-SG
ISBN: 5829 2015 CP
Author: Arne Dugstad
Publication Date: 2015
$0.00
Picture for 08542 Further Validation of an Internal Pitting Corrosion Model
Available for download

08542 Further Validation of an Internal Pitting Corrosion Model

Product Number: 51300-08542-SG
ISBN: 08542 2008 CP
Author: Sankara Papavinasam, Alebachew Demoz, Winston Revie, and Kirk Michaelian
Publication Date: 2008
$20.00