• Tuesday, December 1, 2020
    11:00 am - 3:30 pm


The Taranaki Division of the ACA’s NZ Branch and the ACA’s Oil and Gas Technical Committee are pleased to invite all interested parties to this half-day online seminar featuring five guest speakers delivering presentations focused on dealing with the Prevention, Detection and Remediation of Hidden Corrosion.


All times in program are in AEDT

Local Timings
AWST – 8am-12pm
AEST – 10am-2pm
ACDT – 10:30am – 2:30pm
AEDT – 11am-3pm
NZDT – 1pm-5pm

11:00 am – “Hidden Corrosion: An Cathodic Protection Specialists Perspective – Peter Wood (CCE)


11:45 am – Ultrasonic Sensors to Monitor Pipeline Wall Under Composite Repair – Nestor Sequera (SN Integrity)

Mr Nestor Sequera is the Technical Manager of SN Integrity. He is a Materials Engineer, highly motivated and lateral thinking individual, specializing on fixed equipment integrity, Risk-Based Inspection (RBI), Non-Destructive Testing (NDT), root cause failure analysis and materials evaluation.


This presentation will discuss Inductosense novel solution to monitor the wall thickness of an internal corroded pipe under an Engineering Composite Repairs (ECR) without removing the wrap or using other costly Non-Destructive methods (e.g. Radiographic, Internal visual Inspection). The Wireless And Non-Destructive (WAND) system that uses inductive coupling to excite a wireless, battery-free sensor and make ultrasonic thickness measurements (UTMs) on a structure. The system consists of two main parts: the ultrasonic sensor and the measurement handheld probe. The sensor is less than 1 mm thick, entirely passive and can be installed onto the piping substrate that needs to be reinforced before the ECR is installed. The handheld probe powers up the sensor by non-contact inductive coupling when it is brought nearby, even if the sensor is under the composite repair. The sensor then sends out an ultrasonic wave into the piping and detects the received signal. This is then transmitted back wirelessly to the handheld probe where the signal is analysed providing the current thickness of the pipe. WAND is a cost-effective solution to monitor internal corroded pipelines that has been reinforced by an ECR validating its design and potentially extending the life of the pipe.

12:30 pm – Filling the Gap for Live Sweating Pipelines – Michael Kaoud (Anti-Corrosion Technology)

Michael has worked with Anti Corrosion Technology for more than 5 years, starting as a Project Engineer and worked his way up to the Engineering Services Lead. Michael has completed his Bachelor of Engineering (Mechanical) with a Minor in Design and is currently finalising his Master of Science (Corrosion Engineering). Michael’s experience and work have subjected him to various corrosion-related anomalies in various environments where his specialty has been prevention through unique barrier coatings within, predominantly, the O&G, Refining and Mining sectors.


Coating rehabilitation on condensing lines has always posed to be both a labour intensive exercise and disruptive to gas operations. As such, the ability to select the appropriate coating for rehabilitation and execute it correctly, is essential to increasing the efficacy of the appropriate coating and significantly reduce costs from installation, and throughout designed coating lifecycle. The ability to utilise a unique material, namely pure Polyisobutene based coatings infused with hydroscopic ingredients, eliminates costly dehumidification enclosure setups, and disrupting operations due to the higher surface tolerance, when applied to a line operating below the dew point. In turn, this assists with mitigating further corrosion, due to compromised coatings and rapid coating breakdown, as shown through in-service track record.

This presentation will outline this significant industry gap, coating rehabilitation of live condensing lines, explaining how this achieved along with sharing a relevant case study, as kindly permitted by one of Australia’s major gas Asset Owners.

1:15 – Break

1:30 pm – Detection of Hidden Corrosion with Electrochemical Noise and Machine Learning Methods – Yang Hou (Curtin Corrosion Centre)

Yang Hou is a postdoc researcher at Curtin Corrosion Centre, Curtin University. She is actively involved in multiple industry-led research projects, particularly the evaluation of self-inhibiting insulations and volatile corrosion inhibitors for mitigating corrosion under insulation (CUI) and application of electrochemical noise for CUI monitoring.


The onset and propagation of corrosion can be difficult to detect and monitor if the metal substrate is not visually exposed. It is even more challenging when the predominant form of corrosion is localised. Commonly used corrosion monitoring techniques such as electrical resistance and polarisation resistance may provide an indication of the uniform corrosion rate. However, they are not capable of flagging the occurrence of localised corrosion, which is more detrimental to the integrity of the metal structure if overlooked. This presentation proposes the use of electrochemical noise technique combined with machine learning methods for corrosion monitoring and identification of localised corrosion. The concept of the proposed methodology is demonstrated through two widely investigated yet unsolved corrosion problems – under deposit corrosion (UDC) and corrosion under insulation (CUI).

2:15 pm – Microbiologically influenced corrosion management – Laura Machuca (Curtin Corrosion Centre)

Dr Laura Machuca is an environmental microbiologist and corrosion subject matter expert, whose research activities focus on the interaction of microbes with metals and alloys. She works as a Senior Research Fellow at Curtin University and is the Microbiologically Influenced Corrosion (MIC) research team leader at the Curtin Corrosion Centre (CCC). Her team applies a combination of expertise in microbiology, chemistry and corrosion science to investigate and mitigate the effects of bacteria on corrosion and deterioration of metallic equipment, vessels and pipelines, which cost the industry billions of dollars annually. Laura has expanded her research to study the microorganisms inhabiting the deep sea and their interaction with subsea infrastructures, which has led to the development of science programs with the Western Australian Museum and the Navy. She has been invited to present her work nationally and internationally to a variety of audiences including industry, public and academic.


Microbiologically influenced corrosion (MIC) results from accelerated deterioration driven by microorganisms. It involves the complex interaction of electrochemical, environmental, operational, and biological factors that often result in substantial increases in corrosion rates to metals. MIC drives a worldwide market for microbial control that is worth billions of dollars annually. Although MIC is a phenomenon that has always occurred in the industry, it is still poorly understood and recognized. The advances in experimental methods and the development of high performance genetic and bioinformatic tools have substantially improved our understanding of microbial communities associated with oilfield systems and corrosion. However, careful interpretations are required for the vast amount of data modern sequencing technology can produce.

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