C2024-20432 Susceptibility To Localized Corrosion Attack And Application Service Envelopes For Ni Based Corrosion Resistant Alloys In Oil & Gas Production Service Conditions, A Literature Review.

Raymundo Case, Yuan Ding, Lei Zhao, Jiaxiang Ren , Tim Dunne - Despite improvements in alloy design and fabrication technology that have made these materials Nickel based corrosion resistant alloys (CRA) retain a fundamental flaw - the complex metallurgy associated with the typical Nickel based alloys bring forward the presence of phases which can assist environment-induced cracking. This paper presents a review of the published literature on the fields of localized corrosion and stress corrosion cracking over the last 30 years to describe the fundamental problems that need to be addressed so reliable environmental service envelopes can be identified for this type of CRA within the oilfield application conditions. The review study indicates that the passive layer instability is associated with the conditions where stress corrosion cracking can occur, hence the systematic study of the effect of the main independent variables (temperature, chloride content and sour gas CO2/H2S ratio)