Tech Briefing - Number One

Application	Lifting Bridge
Location	Lowlands of Scotland
Environment	Close proximity to Fresh water
Component	Cylinder Control Manifold

The original installation of the equipment was dated to 2001, the date of inspection mid 2005.

The original requirement of life time operational was 30 years.

It has for some time been considered that nickel plating of steel manifold blocks in this type of environment was suitable & sufficient to prevent corrosion of the surfaces.

It is evident from this image that exposure to the environment combined with road salts, further considerations of protective finishes are required.

Considerations are recommended with respect to material selection of fixings & components, in this particular application a steel manual lowering needle valve was provided, corrosion of the exposed thread, rendered the valve unusable in the event of an emergency, the exact purpose of it's existence.

Solution