This page contains a Flash digital edition of a book.
Specialist Coating


Inspection & Consulting


FEATURE SPONSOR


PROTECTIVE COATINGS


CORROSION CONTROL FOR WINDFARMS


The offshore wind industry benefits from transferable supply chain skills, predominately from the marine and oil & gas sectors. However, in doing so, the industry mustn’t repeat the mistakes of these sectors. The challenge of corrosion control using protective coatings is one of these areas.


Barrier has developed innovative processes and expertise, built on extensive experience in the established offshore industries, which are applied to the offshore wind market.


TRIAL APPLICATION


Before any coatings are applied to a major structure, a trial should be carried out with the coating system to ensure operatives are familiar with it and what equipment works best for the coatings.


The coating specification is important as it details how the system is to be inspected, when and by whom. Too many specifications assume coatings can be applied to within microns of a specified dry film thickness (DFT), when in practice it is plus or minus hundreds of microns for a high-build coating.


Of course, no coating or applicator is perfect. Perfection would come at an unacceptably high price. Therefore there will be minor breakdown over the life of the coating before first major maintenance – this should be planned for.


REPAIRS AND MAINTENANCE The sooner minor repairs are made, the less costly they will be and less likely to break down again before first major maintenance. They should also be logged, and fed back to the applicators/industry so that ways can be found to reduce these on future projects.


Robert Bowles LESSONS LEARNED


Unfortunately, this is not the case in the oil & gas industry, where the same mistakes have been made for the past 40 years.


COATING APPLICATION


In my experience, a coating that can be applied reliably is as important as one with ‘high performance’. It should also be tolerant of over-application, and not be specified at its minimum thickness to achieve a maximum performance.


However, as important as the coating is the contractor charged with its application. The applicator should have a proven track record and an experienced workforce. Unfortunately, there is no independent grading of coating applicators or a database of coating failures and causes, which means the due diligence of the operators and main contractors has to be robust.


CONFUSION, CONFLICTS AND COSTS Specifiers often include ‘just in case’ standards, which are not relevant to the application. This leads to Confusion, Conflicts and Costs. The ideal is to focus on the areas where the coating is most likely to breakdown.


Cost savings can also be applied for inspections, essentially not repeating the ‘man marking’ process of the oil & gas industry, which often leads to three or more inspectors checking each other’s work. If quality is built in, only one inspector is required and another person monitoring the inspection regime.


Expectations need to be realistic, the industry will not achieve an offshore 30 years to first long-term maintenance using a cheap coating and an inexperienced applicator. Neither will coatings be maintenance-free for 30 years.


However, utilising specialists that have developed innovative coatings systems and application methods, while learning from experiences in other sectors, will help deliver the construction and operational targets of the offshore wind industry.


Robert Bowles Chairman Barrier Group


www.windenergynetwork.co.uk 89


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92