The branch kicked off 2018 with 3 well attended events

The branch kicked off 2018 with 3 well attended events

The branch kicked off 2018 with 3 well attended events with an average attendance of over 60 people, beginning with a special cathodic protection evening on the 30th of January. In the first of two presentations, Edgar Rodrigues of TAQA gave an excellent talk on “Impressed Current Cathodic Protection Retrofit Strategy in the North Sea”.

TAQA’s fixed drilling and production installation was installed in the North Sea in 1980 in 161 metres water depth approximately 110 miles north-east of Lerwick in the Shetlands.   The platform jacket has 8 legs and was installed with traditional stand-off galvanic anodes, but its sacrificial CP System is now beyond its original design life.   Surveys from 2010 to 2013 indicated a reduction in corrosion protection from the CP system, and plans were implemented to upgrade this. A remote impressed current CP (ICCP) anode sled system was selected, installed and commissioned in early 2016. This presentation discussed the CP design process and the many challenges in choosing what was at the time, the largest ever CP retrofit, both in terms of delivered current capacity offshore, and the CP current demand of the structure required to maintain external corrosion protection.  All retrofit CP systems however require regular CP data to validate CP performance and this can often be erratic and costly to obtain, typically involving ROVs, as was discussed in the second presentation of the evening.   

Andy Smerdon of Aquatec Group continued the evening with a very interesting and complimentary presentation on “Retrofit CP Monitoring to Reduce Inspection Frequency”.   Aquatec was founded by the current managing director in 1990 as a specialist consultancy in oceanographic instrumentation design.  This presentation described a CP toolbox within a UK North Sea case study, comprising monitoring and communications modules that were used to provide high quality CP potential and CP current data sets, accessed remotely from diving vessels and platforms.    The cost of CP monitoring equipment when simultaneously installed with retrofit CP systems, is relatively low and normally recovered by dispensing with just one conventional subsea inspection campaign, in favour of remotely retrieved data.

The branch’s second event in January, took place at the School of Mechanical Engineering at Aberdeen University, where a Corrosion Awareness training session was held. In the packed two hour event, there were 6 presentations covering corrosion theory and failure mechanisms, principles of corrosion management, materials and coatings selection, risk based inspection, cathodic protection, chemical and corrosion monitoring, all of which prompted a number of interesting questions from the enthusiastic audience.

Retrofit CP Monitoring

In recent years, ICorr Aberdeen has established a strong working relationship with the Aberdeen branch of IMECHE and in particularly its Young Engineer Panel, and a further more extensive Corrosion Awareness event will follow in August 2018, details will be announced in the May/June magazine, and on the branch website.

The February event focused on internal corrosion management Issues, particularly corrosion mitigation by chemical control and optimisation. A very enjoyable and informative presentation was given by Emma Perfect, CEO of LUX Assure Ltd, who described the development of an onsite technique for measuring dosage of corrosion inhibitors used in the protection of pipelines. This advanced technique was developed as there was a perceived need to identify more quickly, and more accurately, when dosing levels of inhibitor were either below or above the threshold for protection, and hence allow an operator to adjust levels to better protect equipment from corrosion, or have options to lower the dosage level to reduce costs of inhibitor supply.

Development of the LUX Assure Control Concept commenced in 2008 and the company has been supported by key energy industry players including Chevron, ConocoPhillips and Statoil Technology Ventures, along with the Scottish Investment Bank and Archangels / Private Investors. The technique relies on the fact that corrosion inhibitors form micelles in the body of the fluid once all available sites for absorption are occupied. This is essentially a saturation point, and the micelles formed increase in concentration as inhibitor is supplied in excess of optimal levels.

With access provided to suitable trial sites, the development of the technique and a suitable kit for onsite monitoring progressed over a period of 3-4 years until it was fully commercialized in 2013.  LUX Assure gathered data to show operators that this technique could be used to test fluids and identify the Critical Micelle Concentration (CMC) of a surfactant above which micelle formation occurs. But the real challenge for LUX Assure was to develop a kit, (now known as CoMicTM) which operators offshore could use to sample and analyse fluids in the field in relatively uncontrolled environments without precise preparation. The specialised kit includes detection reagents and an optical analyser. Final data processing evaluation of the sample is still currently performed back at the offsite laboratory and results and advice swiftly communicated back to the field, but a full onsite service is currently being progressed. 

CoMic Testing Kit

The presentation, which was well received, went on to describe case studies and discuss when samples may not be suitable for testing, and also the correct use and interpretation of the data for the test situation. It is hoped that in the near future that all data interpretation can be made by the test operator if a practical and proven site assurance system can be developed.

For information about all forthcoming Aberdeen branch activities, please contact, Dr Yunnan Gao, ICorrABZ@gmail.com, alternatively a calendar of local events of interest to corrosion professionals in the Aberdeen area and the opportunity to sign up to the branch mailing list is available at https://sites.google.com/site/icorrabz/home

Function – Related Dosage of Corrosion Inhibitors The Development of an on-site Operator Deployable Technology

The February event focused on internal corrosion management Issues, particularly corrosion mitigation by chemical control and optimization.    A very enjoyable and informative presentation was given by Emma Perfect, CEO of LUX Assure Ltd, who described the development of an onsite technique for measuring dosage of corrosion inhibitors used in the protection of pipelines. This advanced technique was developed as there was a perceived need to identify more quickly, and more accurately, when dosing levels of inhibitor were either below or above the threshold for protection, and hence allow an operator to adjust levels to better protect equipment from corrosion or have options to lower the dosage level to reduce costs of inhibitor supply.

A well supported event at Palm Court Hotel

Development of the LUX Assure Control Concept commenced in 2008 and the company has been supported by key energy industry players including Chevron, ConocoPhillips and Statoil Technology Ventures, along with the Scottish Investment Bank and Archangels / Private Investors. The technique relies on the fact that corrosion inhibitors form micelles in the body of the fluid once all available sites for absorption are occupied. This is essentially a saturation point, and the micelles formed increase in concentration as inhibitor is supplied in excess of optimal levels.

With access provided to suitable trial sites, the development of the technique and a suitable kit for onsite monitoring progressed over a period of 3-4 years until it was fully commercialized in 2013.  LUX Assure gathered data to show operators that this technique could be used to test fluids and identify the Critical Micelle Concentration (CMC) of a surfactant above which micelle formation occurs. But the real challenge for LUX Assure was to develop a kit, (now known as CoMic TM) which operators offshore could use to sample and analyse fluids in the field in relatively uncontrolled environments without precise preparation. The specialised kit includes detection reagents and an optical analyser. Final data processing evaluation of the sample is still currently performed back at the offsite laboratory and results and advice swiftly communicated back to the field, but a full onsite service is currently being progressed

The presentation, which was well received, went on to describe case studies and discuss when samples may not be suitable for testing, and also the correct use and interpretation of the data for the test situation. It is hoped that in the near future that all data interpretation can be made by the test operator if a practical and proven site assurance system can be developed.

For Copy of the article please click link below:

Aberdeen Branch February 2018 Meeting – Newsletter Vol.1.R1

 

 

 

Aberdeen Joint Event with Mining Institute of Scotland (MIS) and IOM3  Oil and Gas Division

Aberdeen Joint Event with Mining Institute of Scotland (MIS) and IOM3 Oil and Gas Division

The Branch continued its successful 2017-2018 session with a high turn-out (68 attendees) at its joint event with the Mining Institute of Scotland (MIS) and IOM3 Oil and Gas Division, (Over the last few years MIS has established a strong working relationship with the Aberdeen branch and holds an annual joint technical evening that is funded alternatively).

The key topic under discussion was Corrosion under Insulation (CUI).  This is a major issue for not only the oil and gas sector, but industry in general, with an estimated annual cost to the UK of £28 billion. The event started with a buffet and a poster presentation from Tianyang Lan, a MSc student from Northampton University, who presented the experimental work that he had been undertaking, assessing both physical and electrochemical techniques for measuring CUI.  Two physical methods and two electrochemical methods were used in this test work, Eddy Current Testing (ECT), IR Thermography (IRT), Electrochemical Impedance Spectroscopy and Electrochemical Noise Method (ENM). The samples used to conduct the experiments were carbon steel panels at different corrosion stages, used to simulate the pipe condition, with standard maintenance organic coatings and insulation tapes representing the pipe insulation. Results have indicated that ECT/IRT could not discriminate rusting beneath a coating when it was greater than about 250microns thick however the electrochemical methods showed immense promise. Insulation of course covers all signs of corrosion.

MIS, with IOM3 Oil and Gas Division, had arranged two technical presentations. The first was given by Rebecca Allison of the Oil and Gas Technology Centre, (OGTC, a public / private initiative), who introduced the topic of CUI and the role of the OGTC in addressing the challenges of CUI.  Rebecca provided an overview of new technologies being supported by the OGTC and got comprehensive feedback from the audience on these, however she highlighted that addressing CUI is not just about technology, a holistic approach including working practices, procedures, competency, human factors and data management is required.

Bill Brown and Mike Dixon of The Rope Access Company (TRAC) then built on the overview provided by Rebecca with a presentation providing results from their field and yard trials assessing the latest tools and techniques available to measure and analyse CUI, which included developments with pulsed eddy current and digital radiography.   Field and yard work highlighted key issues for practitioners to be aware of.   

The Oil & Gas Industry has experienced many challenges when inspecting for Corrosion under Insulation (CUI), assessing the condition of steel components under Engineered Composite Wraps and the minimum remaining wall thickness under surface scabs / blisters. The aim of their OGTC supported project is to try and determine the limitations of the available NDT methods relative to each application. TRAC plans to share the ongoing research and development overview obtained to date.

At closing, a warm vote of thanks to all the presenters was made by the new MIS President Bob Laird for their valuable contributions which were very much appreciated by all those in attendance.  Next year’s joint meeting is already scheduled for 27 November 2018 at the Palm Court.

Information about all forthcoming Aberdeen branch activities can be found on the diary page of the magazine and on the Institute website, a calendar of local events of interest to corrosion professionals in the Aberdeen area and the opportunity to sign up to the branch mailing list is available at https://sites.google.com/site/icorrabz/home. Aberdeen Branch have also established their new Media Centre on LinkedIn, which can be found at https://www.linkedin.com/in/aberdeen-icorr/recent-activity/

The 2017-2018 ICorr Aberdeen Sponsors currently include: Aberdeen Foundries Ltd, Atkins, CAN Offshore Ltd, CORRPRO Companies Europe Ltd, Cosasco, Deepwater, ICR, IMG Composites, IndCorr, LR, North East Corrosion Engineers, Oceaneering International Services, Permasense, Pipeline Technique Ltd, Plant Integrity Management, Spencer Coatings, Rosen, R&R Corrosion Ltd, Total E&P and TRAC.

September and October Meeting

September and October Meeting

The opening events of the 2017-2018 session kicked things off to a very good start with an average attendance of 50.

Firstly, September was a joint event with TWI, and there was a very interesting presentation by Susan Jacob of CAN (Offshore) Ltd, entitled “An Investigation into the Wrinkling Phenomenon on Corrosion Resistant Alloy (CRA) Pipelines and Its Impact on Pipeline Integrity”.  This focussed on issues arising with both the laying and subsequent inspection of thin CRA internally clad pipelines.  CRA’s have been increasingly deployed for new and replacement Pipe Lay Projects however they can be problematic and great care must be taken at the installation stage to prevent wrinkling, as Susan highlighted.   This topic will be subject of a more detailed technical paper in Corrosion Management in January/February 2018. This upcoming paper will aim to respond in more detail to the many questions raised by attendees, who clearly enjoyed the evening, including, the definitive evidence as to whether pipe lay procedures adequately did, in this instance, address the potential risk of wrinkling and whether (10 years on) more modern methods of fitting CRA Liners are any more resistant to this CRA wrinkling phenomenon; the evidence as to whether applying internal pressure can eliminate the wrinkling risk and as to whether cleaning tools irreparably damage the CRA Liner, or whether perhaps increased Anti-Scale CI and Reduced Cleaning Frequency is a safer approach? The article will also consider the ability of the Intelligent Pigging (IP) Tool to detect thinning changes in a 3mm thick CRA Liner and / or small perforations or tears of this liner, and whether there is a likelihood of ongoing corrosion in the CRA/carrier annulus in cases where CRA disbondment has occurred.

The October special event focussed on offshore external corrosion and repair solutions, which most importantly brought together specialists from two (normally competing) companies.   Consultants, Ian Taylor and Nabeel Khan of IMG Composites Ltd., and Gareth Urukalo, Senior Technical Engineer of ICR Integrity Ltd, worked together to provide an objective insight into the development and application of two key standards, ISO24817: 2015, and the increasingly used ASME PCC-2 Code. The two presentations were entitled “Established Composite Engineering in 2017” and “Composite Repairs – A long Life-time Repair Solution”.

Composite repair has been extensively used in the last 10 years to extend the operating lives of process systems, particularly but not exclusively, for piping systems, which would otherwise have required costly interventions and loss of production and outages that may ultimately have caused the facilities to cease production altogether!

The talks considered some key questions that once again generated much interest from the gathered audience.   What came across was the increasing industry confidence that these composite repairs can provide fully engineered long-term repair solutions, providing additional structural strength (subject to necessary quality controls, such as a high standard of surface preparation), to provide to Energy operators a guaranteed service life.

The ‘new world’ of composites was wonderfully illustrated with many practical day-to-day examples such as the new A380 Airliner and the “New Bus for London”, that contain a very high percentage of composites. For example, the four key structural composite parts which make up the rear end of the new bus support the weight of the engine, the passengers on the platform, the staircase and the upper deck. Using these composite materials has resulted in the saving of several hundred kilograms from the structural weight of the bus compared to traditional materials, and of course very significant fuel savings.

Information about all forthcoming Aberdeen branch activities can be found on the diary page of the magazine and on the Institute website, alternatively a calendar of local events of interest to corrosion professionals in the Aberdeen area, and the opportunity to sign up to the Branch mailing list is available at https://sites.google.com/site/icorrabz/home. Aberdeen Branch have also established their new Media Centre on LinkedIn, which can be found at https://www.linkedin.com/in/aberdeen-icorr/recent-activity/

ICorr Aberdeen Chair presents a Certificate of Appreciation to Speaker Susan Jacob of CAN (Offshore) Ltd.