Navigation Buoys

Requirement

Client: Singapore Port Authority.
The port authority had for many years experienced corrosion and severe pitting on many navigational light buoys and beacons. The client required an upgrade of the current red lead primer/alkyd topcoat system, which was being used with only limited success.

Preparation

The buoys were degreased and the entire surface was blast cleaned to Sa2½ of EN ISO 8501-1:2007, to achieve a surface profile of 50 to 75 microns. The preparation was completed with a fresh water wash to remove dust. The buoys were allowed to dry before coating.

Coatings

The buoys were primed with Corroless™ EPF overall. Below the water line, a further coat of Corroless™ EPF was applied. Above the waterline, two coats of Corroless™ RF65, in the required colour, were then applied to complete the application.

Comments: 
The system was approved for general use by the client after a 2 year successful trial.