MARINE...
Bangor Pier (Ireland)
Pictures of the application of Zinga on immersed piles at Bangor harbour.
The piles were first UHP water-blasted and then grit-blasted to give the
correct surface profile. Then 200 µm of ZINGA was applied in 4 coats with
a brush. The work was executed by the contracting company SAR Marine and
General in November 2000.
Bonne Shipyard (Belgium)
Pictures showing the application of Zinga by roller to the blasted hull
of a typical fishing vessel.
De Grave Boatyard (Belgium)
De Graeve n.v. is one of the last well-known shipyards in Belgium. It
is situated in the port of Zeebrugge. They had their first experience
with Zinga in 1980 and they are still using Zinga for newly constructed
vessels as well as for repairing and maintenance of all the boats. These
vessels are operated in the North Sea and Atlantic Ocean.
Testimonial letter from shipyard De Graeve n.v. dated 04/09/89, stating
their satisfaction with Zinga and including a brief application description.
Killybegs Pier (Ireland)
The fishing pier in Killybegs which supports the factory buildings is
held up by 309 mild-steel hexagonal shaped legs, all approx. 600 mm in
diameter. They have been in the sea for 25 years and due to the salt and
the sulphate reducing bacteria (SRB) present in the sea water, they were
losing up to 2 mm per year off their thickness. The waters around Killybegs
are unique because they have the highest rate of corrosion in Europe.
The height from the concrete deck to the water level at low tide is approx.
3-4 meter. At high tide, 1.5- 2 meters of each pile is totally submersed
in seawater.
The piles were prepared by UHP water-jetting and grit blasting to SA 2.5
with Rz 40 to 60 µm. The application happened under the intense surveillance
of SGS AxaMed. It was a very difficult and delicate application as they
had to take into account the tidal movement and the constant contact with
the sea water. Because the conditions were so extreme, SGS AxaMed demanded
a very high dry film thickness of Zinga. The average dry film thickness
was 300 µm.
The application of Zinga on the pier legs at Killybegs Harbour was done
in the summer of 2000. The customer, the Irish Department of Marine and
Natural Resources, and the contractor, SAR Marine & General, wanted to
wait until a full year had passed before giving any official comment on
the performance of the Zinga coating.
The final inspection report (including pictures) dated 15/06/01, issued
by SAR Marine & General for the Department of the Marine and Natural Resources,
describes the excellent condition of the piles 12 months after the application.
Pictures of the pier legs taken in August 2001 - one year after the application.
Zinga is holding up perfectly with no rust showing. Any marking on the
legs is either seaweed or harbour contaminants.
Miscellaneous Boats
The sailing ship Mercator was originally used as a training ship for the
officers of the Belgian navy. She is about 45 m long and carries 3 masts.
The Mercator is now a museum. Once or twice a year she sails in to the
North Sea between Zeebrugge and Antwerp. She was originally treated with
Zinga in 1986. The ship is located in the docks with other sailing ships
all year long. We do not need to explain that the pH and aggressive nature
of this kind of water is very high.
In March 2001 she was docked for inspection. No corrosion was found anywhere
on her all-steel hull. The rivets were still in excellent condition, and
there was no 'rust sweating' between any of the plates in the stern area.
This was her third inspection during the eleven years. No further Zinga
was required and she was refloated shortly after. Needless to say the
association that owns the ship is still very satisfied with Zinga.
 |
|
Sea Buoys
This field trial was conducted by the Department of Maritime Equipment
in France. Two sea buoys were left floating in the Atlantic ocean for
four years. One of the mild steel buoys was treated with Zinga (yellow
buoy) whilst the other was galvanised in the traditional hot-dip process
(green buoy). Both buoys were top-coated to the same thickness of polyurethane
but with a supplementary primer for the hot-dipped buoy. As you can see
the green buoy is severely corroded in several places whilst the Zinganised
buoy shows no trace of rust.
|
