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Refining industry cooling systems are prone to many different corrosion deterioration mechanisms one of which is microbiologically influenced corrosion (MIC). The study resulted in the development of a comprehensive control and monitoring plan to safeguard the integrity of the system.
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Oil sands operations may give rise to various corrosion risks such as pitting corrosion crevice corrosion microbiologically induced corrosion and abrasion-corrosion. This paper focuses on the abrasion-corrosion resistance of various stainless steels and wear resistant carbon steels.
Copper based waterborne wood preservatives increase the corrosion of metals embedded or in contact with the treated wood. We examine wood that was in contact with corroding metal with synchrotron based X-ray fluorescence microscopy (XFM) and X-ray Absorption Near Edge Spectroscopy (XANES) to test if the proposed corrosion mechanism is correct.
Analysis techniques that yield more information about effect of anomalies on fitness for service. RSTRENG calculations on phased array data, integration of UT data with structured light 3D data and the calculation of surface strain maps from structured light 3D imaging of dents.
In this work, the open circuit potential of different stainless steel grades as well as nickel based and copper based alloys has been systematically measured in seawater under different experimental conditions. In particular the effect of temperature, oxygen content and chlorination level have been studied.
Corrosion protective coatings deteriorate for a number of reasons including insufficient surface preparation and deficient thickness. This paper discusses the mechanisms of failure and provides a technical overview regarding the deterioration aspects of coatings.
Corrosion is a major cause of structural deterioration in the marine/offshore industry. FOr that reason, reliability assessment and maintenance planning of these structures are crucial. In the current work a combination multi-phase phenomenological and mechanistic model for pitting corrosion is tested using Bayesian network (BN) approach.
Bayesian networks (BN) are useful tools for corrosion modeling. This paper is a case study demonstrating how to perform Internal Corrosion Direct Assessment (ICDA) using BN modeling with limited data. A BN model was developed for ICDA of a 50 km refined oil pipeline. Internal corrosion probability of failure along the pipeline was assessed.
Galvele introduced a new framework for localized corrosion with his seminal paper on acidification and chloride accumulation in pits & the need for a critical product of current density & pit depth to sustain this chemistry. This paper is to review the progress in these areas with a particular focus on repassivation potential.
In 2010, mechanical integrity personnel started the application of the Direct Assessment (DA) and Inline Inspection Methodologies (ILI) to establish the integrity validation baseline assessments for a Pipeline Integrity Program (PIP) for the pipelines operated within Blocks 12 and 15 by Petroamazonas EP, in Ecuador.
This paper will show improvements in interpretation of direct current voltage gradient % IR and how accurate selection of pipeline coating rehabilitation location based on this concept would lead to improvements in cathodic protection performance. Case studies from previous external corrosion direct assessment digs will be presented.