TAGS: Marine and Protective Coatings Industrial Coatings
Experiments at ASC’s deep submarine maintenance facility in Adelaide have shown a new type of surface coating can eliminate marine biofouling, or sea organism growth, on the hulls of naval vessels and other submerged surfaces.
Improve Operation and Maintenance of Naval Vessels
Breakthrough experiments conducted at ASC’s deep submarine maintenance facility in Adelaide have demonstrated how electrically charged surface coatings can eliminate marine biofouling, or sea organism growth, potentially improving the operation and maintenance of naval vessels.
The research, led by experts from Flinders University with partners ASC, the University of South Australia and the Department of Defence, is funded by the South Australian Defence Innovation Partnership program and aims to develop practical applications that could end the scourge of marine biofouling, which costs billions each year worldwide.
Flinders University’s professor Mats Andersson, director of Flinders Institute for Nanoscale Science & Technology and Theme Leader in the Biofilm Research and Innovation Consortium, said the latest inspections of the samples showed the research was performing exceptionally well.
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Our tests have shown that fouling can be significantly reduced and, in some cases, completely eliminated on the surfaces that are coated with a conducting paint and subject to electrochemical stress,” said Professor Andersson.
“To be honest, we are surprised that it works so well. As far as we know, there isn’t a lot of this research being done around the world and while our research is specific to the Port River in Adelaide, it could be applied to any surface that is submerged in the ocean.”
Active Anti-fouling Experiments
The so called ‘active anti-fouling’ experiments have tested a range of materials, coatings and electrical cycles, comparing them against non-electrically stressed samples. ASC, which maintains and upgrades Australia’s Collins Class submarine fleet, is supporting the innovative research by providing advice, laboratory and wharf facilities for submerging the samples.
ASC Principal Development Engineer – Materials, Mikael Johansson, said marine biofouling caused obstructions to key areas of the hull that were time consuming and expensive to clear. “
Warships and submarines use sea water in the cooling systems of propulsion and weapons systems — even air conditioning. Making sure the inlet valves, which let that water in, don’t become clogged with marine life, is a priority,” said Mr. Johansson.
“This research could lead to protecting various parts of the Collins Class submarine hulls, leading to fewer interruptions to naval operations and less maintenance.”
It has been estimated that clearing marine bio-fouling costs billions of dollars each year for shipping companies and navies worldwide. A fully developed ‘biofouling community’ growing on a ship’s hull, can cause up to 40 per cent more fuel consumption, due to the additional hull drag and poor maneuverability.
The research program is being funded with the assistance of $150,000 from the South Australian Defence Innovation Partnership, supported by the South Australian Government and the Department of Defence.
Source: ASC