Case Study: Course water filter screens pro-biofoul anti-foulant

Eco-friendly, mechanically strong & gives extended life.

Client

Power Industry.

Application Date

2004.

Scope Of Work

Prepare screens by pressure washing, manual cleaning & scraping, then abrasive blasting to remove marine growth, debris and corrosion deposits. Assess repair work. Apply corrosion protection and Biofoul.

Products

Corroglass 600 Series for repair and re-profiling, with a Polyglass PPA primer coat. Top coat of Biofoul applied for anti-fouling requirements.

Substrate

Steel fabrication

Coating system

• Grit blast whole structure to ISO 8501-1, cleanliness
standard SA 21/2with minimum surface profile of
50µm.
• Apply Polyglass PPA to whole structure as a primer
for the Corroglass 600 Series, applied to a min.dft
of 1.5mm.
• Apply top coat of Biofoul.

Coating credentials

Biofoul is an eco-friendly non-toxic coating. The
mechanism by which Biofoul provides anti-fouling
properties enables the product to be used in both static
and self-polishing environments.
The coating is mechanically strong (unlike many
Self-polishing anti-foulants), has a long life (when used
in conjunction with a Corrocoat corrosion system) and
is non-toxic.
By applying a final coat of Biofoul, the Power Station
has eliminated the costly requirement for regular
cleaning & maintenance by divers.
In addition to this replacing these screens would have
cost considerably more than re-profiling and protecting
by Corrocoat.

Photographs

Left: The screen after pressure washing – showing the
extent of corrosion and pitting.
Middle: Detail of the re-profiled cross-members.
Right: The completed screens awaiting dispatch.