Conflicting Views: CO2 Corrosion Models, Corrosion Inhibitor Availability Philosophies, and the Effect on Subsea Systems and Pipeline Design

摘要

This publication examines the influence of different corrosion models, corrosion availability philosophies, corrosion control philosophies and standards on materials selection and corrosion allowance design criteria for subsea systems and pipelines. These differ enormously from operator to operator and national authority to national authority. The result is that for the same nominal environmental conditions, pipeline and subsea systems designs can vary enormously, depending on who is the client and where the facility will be situated. Also, it results in designs that would be deemed as entirely acceptable for operation in one area of the world, but which would be considered as unsafe for operation in another. This publication discusses the nature of these influences, and the effect on subsea system materials selection and corrosion allowance. It also discusses the conceptual conflict between what can be designed for in theory, and what experience tells us has actually been achieved in practice. Finally, it discusses the approach that Ionik Consulting would take in formulating solutions to these issues.