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Featured researches published by Facundo Varela.


Corrosion Engineering Science and Technology | 2015

An overview of major methods for inspecting and monitoring external corrosion of on-shore transportation pipelines

Facundo Varela; Mike Yongjun Tan; Maria Forsyth

Abstract Corrosion can occur on underground pipelines especially at coating defects, where metal can be considered directly exposed to the soil, or under disbonded coatings, where the occluded geometry significantly affects the efficiency of cathodic protection (CP). In order to ensure the effectiveness of corrosion mitigation measures such as CP and protective coatings, inspection and monitoring of pipeline corrosion are required. This paper provides an overview of major methods that are used for inspecting and monitoring external corrosion of on-shore pipelines subjected to CP. Particular focus is on discussing the advantages and limitations of major inspection tools that are used to ensure pipeline integrity, and electrochemical corrosion sensors that are designed to monitor pipeline corrosion processes and rates. It is shown that there is a need for expanding the capabilities of corrosion monitoring methods suitable for the pipeline industry.


IPC 2014 : Proceedings of the 10th Biennial International Pipeline Conference | 2014

A Novel Approach for Monitoring Pipeline Corrosion Under Disbonded Coatings

Facundo Varela; Mike Y.J. Tan; Maria Forsyth

Underground pipeline corrosion monitoring is a complex technical challenge. Currently there is no corrosion monitoring probe that is able to provide in situ information on corrosion under disbonded coatings. This paper presents a proof of concept of a novel corrosion monitoring probe intended to simulate corrosion under disbonded pipeline coatings and monitor its rate under Cathodic Protection (CP). The probe’s capabilities to measure corrosion rates and simulate disbonded coating conditions are illustrated by a typical experiment that involved testing of the probe in 0.1M NaCl at −850mVCSE. Estimated metal thickness losses based on results measured by the probe were compared against corrosion patterns and profilometry measurements of control specimens exposed to the same conditions.Copyright


Corrosion science and technology | 2017

Monitoring Cathodic Shielding and Corrosion under Disbonded Coatings

Facundo Varela; Yongjun Tan; Bruce Hinton; Maria Forsyth

This work presents a novel corrosion monitoring probe designed for simulating the conditions developed under disbonded coatings and for measuring current densities and their distribution over a simulated pipeline surface. The probe’s concept was experimentally evaluated via immersion tests under Cathodic Protection (CP) in high resistivity aqueous solution. Under the disbonded area, anodic currents as well as cathodic currents were both measured. Anodic current densities were used to calculate metal losses by means of Faraday’s law. Calculated corrosion patterns were compared with corrosion damage observed at the probe’s surface after a period of test. The probe’s working principles are explained in terms of simple electrochemistry.


ECS Electrochemistry Letters | 2014

An Electrochemical Method for Measuring Localized Corrosion under Cathodic Protection

Facundo Varela; M.Y.J. Tan; Maria Forsyth


Journal of The Electrochemical Society | 2015

Electrochemical Method for Studying Localized Corrosion beneath Disbonded Coatings under Cathodic Protection

Facundo Varela; M. Yj. Tan; Maria Forsyth


Electrochimica Acta | 2015

Understanding the effectiveness of cathodic protection under disbonded coatings

Facundo Varela; M.Y.J. Tan; Maria Forsyth


Corrosion and Prevention : Proceedings of the 2014 Annual Conference of the Australasian Corrosion Association | 2014

Corrosion monitoring under disbonded coatings

Facundo Varela; M.Y.J. Tan; Maria Forsyth; Bruce Hinton


Corrosion and Prevention 2013 : Proceedings of the Annual Conference of the Australasian Corrosion Association | 2013

A REVIEW OF TECHNIQUES FOR THE MONITORING OF CATHODIC SHIELDING AND CORROSION UNDER DISBONDED COATINGS

Facundo Varela; M.Y.J. Tan; Maria Forsyth; Bruce Hinton; C Bonar


Corrosion and Prevention. Conference (2016 : Auckland, New Zealand) | 2016

An overview on cathodic shielding produced by disbonded coatings

Mauricio Leonel Latino; Facundo Varela; Yongjun Tan; Maria Forsyth


Progress in Organic Coatings | 2018

Self-validating electrochemical methodology for quantifying ionic currents through pipeline coatings

Mauricio Leonel Latino; Facundo Varela; Maria Forsyth; Yongjun Tan

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Tracey Markley

Commonwealth Scientific and Industrial Research Organisation

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