Corrosion Monitoring and Control

This paper describes corrosion rate prediction models for the main corrosion mechanisms of carbon steel in Exploration and Production service. The models succeed earlier work by De Waard, Milliams, and Lotz.

Case Study: These lines, which are operating in about 500 Completion Risers Joints for more than 3 years exposed to a mixture of seawater, mud, oil and eventually products of acidification in the annular space.

An investigation was conducted to characterize the corrosion behavior of Type 316L stainless steel (UNS S31603) in a sulphamic acid (NH2HSO3) cleaning solution.

This paper summarizes the Top Ten corrosion issues and examines the controlling factors that affect damage including the effects of operating parameters. Best industry practices used to monitor for problems and to inspect for damage are discussed.

A recent pre-1970 ERW Pipe Seam Weld Failure incident is presented. The investigation combines metallurgical and fractographic analysis, fracture mechanics testing, and failure analysis diagram to determine the origin and nature.

The crevice corrosion resistance of duplex and super duplex stainless steels used for seawater pumps was evaluated by comparing the to results tests conducted using actual seawater  with the behavior of the stainless steels in artificial seawater

Field experience was studied to identify the best solutions to Localized corrosion of 316 stainless steel instrument and chemical injection tubing in marine environment. Laboratory tests and exposure in marine environment of samples have been used to evaluate possible alternative materials and protective chemicals.

 This paper presents a recent effort to further minimize the threat of corrosion by wet ammonium chloride salt.  Includes advances in  fundamental understanding salt behavior, predictive mdeling,  integration of models with process and operations.

Common scenarios for underground corrosion at foundations of telecommunication towers are explained, and practical methods for corrosion risk assessment and corrosion risk mitigation are briefly reviewed.

Comparisons with improved data accuracy of installed sensors in lieu of larger quantities of manual spot data are presented. This paper will include the design principles used in the creation of this next-generation platform, end-user input used to refine the design, and recent installation and operational experiences.

The corrosion process of carbon steel in the presence of silica sand deposit in chloride-containing solution at 30 °C was monitored by use of electrochemical noise (EN). Results demonstrated that electrochemical noise with recurrence quantification analysis is useful for monitoring localized under deposit corrosion.

Results of the stress corrosion cracking tests showed that wrought UNS S31803 was not resistant to environmentally-induced cracking or corrosion in the test environment. A difference in surface finish did not have a significant effect.