CORROSION · 1995 · 85 citations · 2 references
EngineeringChemical EngineeringPetroleum EngineeringCorrosion ScienceGeotechnical EngineeringInorganic ChemistryCorrosion EngineeringCorrosion MechanismsCorrosion Of Construction MaterialsCorrosion ProtectionStress Corrosion CrackingSubsea PipelinesCarbon DioxideCarbon Dioxide CorrosionCo2 CorrosionCorrosion Of Subsea PipelinesIntergranular Stress Corrosion CrackingPipeline Cathodic ProtectionPipeline CorrosionTransgranular Stress Corrosion Cracking
Consideration was given to how carbon dioxide (CO2)-containing ground water, which can promote transgranular stress corrosion cracking of pipelines, can be converted to a higher pH, carbonate-bicarbonate (CO32–-HCO3–) solution that promotes intergranular cracking of pipelines. The lower pH environment will remain only if the cathodic protection generates insufficient hydroxide ions to convert the free CO2 to HCO3– and/or CO32–. The generation of these ions also requires the transport of anions out of and cations into the solution contained between the pipe surface and its coating.
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