Evaluation of two repair methods for Duplex coatings
Authors: Prof. Dr.-Ing. Kirsten Bobzin, Dr.-Ing. Martin Andreas Knoch, Dr.-Ing. Frank Prenger, Werner Krömmer
The economic use of offshore wind turbines requires a reliable and long-lasting corrosion protection. So called duplex-systems consisting of a thermal spray coating, a sealer and several layers of organic coating have been proven to provide such protection. In case of severe damages of the coating system, the surrounding coating is often removed and subsequently, the duplex-system is rebuilt from scratch. In the present study, two integrated coating removal and substrate pre-treatment methods are investigated. For this purpose, duplex-systems were produced, artificially damaged and afterwards treated by grit blasting and with a rotating steel-wire brush. Afterwards, the duplex coating was re-applied. A 38 week-long salt spray test revealed a pronounced influence of the pre-treatment on the corrosion protection
potential.
Pages: 98 - 104
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