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Acqueducte Boresin, Malaga, Spain

Protection of 1,500 m2 of new water pipes for Acqueducte Boresin in 2006 in Malaga, Spain. After preparing the surface by powered wire brush to CSt 3 to ISO 8501-01, Zinc Tape was applied as a single layer.

Zinc Tape protection of new water pipesPipes as delivered required wire brushing before Zinc Tape application

Zinc Tape protection of new water pipesSetting up to use the Metawrapper on pipes resting on temporary supports.

Zinc Tape protection of new water pipesLifting wrapped pipe into place.

 

British Energy, England

Repair of Nuclear power Station pipework at Heysham in 2007. After preparing the surface by powered wire brush Zinc Tape was applied as a single layer.

Original condition of pipesOriginal condition of pipes.

ZincTape wrapping of bend. Zinc Tape wrapping of bend.

ZincTape wrapping up to flanges of a pipe. Zinc Tape wrapping up to flanges.

 

Petronas, Malaysia

Repair of pipework on offshore oil platform in Bokor, Malaysia in 2005. After preparing the surface by powered wire brush Zinc Tape was applied as a double layer.

Original condition of pipesOffshore location.

ZincTape wrapping of bend. Laying up the Zinc Tape on a prepared section.

ZincTape wrapping up to flanges of a pipe. Pressing out the Zinc Tape with a Metapress.

 

Pipes at Pemex Refinery, Mexico

Zinc Tape was applied to 7000m2 of pipe and tanks in the cooling water system in 2002 after original organic paint system failed prematurely and the Zinc Tape was proven in trials. Pemex say the Zinc Tape reduced maintenance time and materials costs.

This image shows ZincTape applied to various cooling water pipes. Zinc Tape applied to various cooling water pipes.

Zinc Tape applied to vessels. Zinc Tape applied to vessels.

Zinc Tape cigarette wrapping. Zinc Tape applied in cigarette fashion to main cooling water pipe.

 

Saras Spa, Italy

Repair of 50,000m2 of severely corroded pipes at Sarroch Jetty , Italy 1992-2005. After Sandblasting to ASa 2.5 (ISO 8501-1) ZincTape was applied as a double layer by spiral wrapping with 50% overlap.

This image shows pipes after preparation, heavily corroded previously. After preparation of heavily corroded pipe.

Wrapping with metawrapper in process. During wrapping with Metawrapper.

Zinc Tape applied to pipes. Finished application.

 

Tank Base for Petkim Refinery, Turkey

Protection of the ring beam supporting the base of a tank using a single layer of ZincTape applied in cigarette fashion.

This image shows severe corrosion. Corrosion was severe threatening the structural performance.

Wire brushing in process. Wire brush preceding application in each section.

Zinc Tape applied to pipes. Corrosion protection is reestablished with Zinc Tape.

 

Universal Column

Zinc Tape was applied to the Universal Columns to give corrosion protection. In the area where concrete was to be placed a GSC Super Anode was attached to give cathodic protection.

This image shows severe corrosion. ZincTape applied to Flange and Web of UC.

Wire brushing in process. During application.

Zinc Tape applied to pipes. GSC Super Anode applied below Zinc Tape to UC area to be in concrete.

Installation of Cassettes for cathodic protection of beams on High Level Bridge, at Rockingham, Western Australia. The high level bridge was built in 1971 as a link between the mainland and the Naval Base on Garden Island. A slotted ribbon anode system was designed some time ago to provide cathodic protection to prestressed T-Roff beams but during installation it was found that the slots could not be easily cut over a portion of the beams. Cassette's enabled exactly the same ribbon configuration but simply mounted on the surface. The system was designed by GHD. Savcor's installation manger reported on the Cassette simplicity to install and felt the system would have many applications. He felt that if it had been available at the start of the project the Cassettes would have been ideal for the whole project.

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SRCP undertake site visit to Stockton bridge trial piers. ZLA gives 400mv 24hr decay.Stockton bridge was built in 1971 to replace the ferry service between Stockton and Newcastle in NSW, Australia. When corrosion was identified the NSW Roads and Maritime Services undertook trials on the use of ZLA to provide cathodic protection on piers where corrosion was active but corrosion damage was not widespread.  The 24 hr decays were well in excess of 100mv required by Australian and ISO codes for true cathodic protection. The trial installation is part of an assessment program of galvanic anodes for cathodic protection. Cathodic protection is considered as the only permanent repair method of reinforcement corrosion. Impressed current systems are expensive to install and maintain and the  cost of repairing all NSW bridges that need protection using ICCP is not possible and hence they are using the much lower cost galvanic system to at least provide a holding repair.

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SRCP visits Yowaka Bridge to assist in first Roll Anode installation to pile caps. The typical cathodic protection system proposed on bridge pile caps is to install water anodes to protect the lower half of the tidal zone.  Roll anodes can then be installed in the tidal and splash zones.  In the spray and atmospheric zones ZLA can be installed (see Stockton Bridge).  The Yowaka Bridge was built in 1936 and crosses Saltwater Creek near Eden in NSW. Corrosion is quite advanced in some areas of the bridge and consistent with the above RMS decided to install Roll Anodes in top of the pile caps.

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Cassettes installed on soffit of coal conveyor tunnel at DBCT, HayPoint, Queensland. Reinforcement corrosion in a coal conveyor tunnel at Dalrymple Bay was to be repaired by installing a cathodic protection system. The walls had been protected but the system could not be installed in the roof. A slotted ribbon anode system was considered but could not be used due to the low cover. Cassette proved to be the ideal way of delivering the cathodic protection. Being surface mounted the low cover and close reinforcement spacing were not a concern.

Cassette was considered late in the process as it was new to Australia. The client had specific requirements for the Cassette design but these were incorporated in the Norwegian manufacturing and the system was delivered to the contractor 2 weeks from the date of order.

This was the first Cassette installation in Australia. The contractor, Freyssinet found it simple and rapid to install even though access was severely restricted.

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