EP 1084947 A1 20010321 - A method of durably and lastingly protect a surface in contact with water from biological fouling
Title (en)
A method of durably and lastingly protect a surface in contact with water from biological fouling
Title (de)
Verfahren zum Dauerschutz von im Kontakt mit Wasser stehenden Oberflächen gegen biologische Fäule
Title (fr)
Méthode pour protéger durablement de l'encrassement biologique une structure plongée dans l'eau
Publication
Application
Priority
- EP 00440142 A 20000516
- EP 99440252 A 19990917
Abstract (en)
An environmental friendly, long-lasting, practical, effective and economic method of rendering a surface antifouling properties is achieved by attaching a very thin copper-containing layer, sheet or foil directly to said surface so as to form an electrically conductive layer. These copper-containing sheets are, according to the invention, protected from oxidation by intermittently applying a cathodic protection. First, copper has been believed to prevent biological growth as a result of the leaching of copper-ions. All previous methods, based on copper, have therefore been designed to release copper-ions, which pollutes the water and causes harm to the biological life. It was thus highly surprising that, by the application of intermittent cathodic protection to the copper-containing sheets, a method which essentially and totally prevents all release of copper to the aquatic environment, the antifouling properties were still maintained. As no corrosion occurs very thin layers can be used adding further advantages to the method such as ease of application, weight and cost. Secondly, it was found, surprisingly and contrary to common belief, that such very thin layers in the form of copper-containing sheets, because of their low weight, flexibility and feeble thickness, could be made to follow any shape so closely, that many commercially available water-resistant adhesives are sufficient to exclude water from penetrating in-between the surface and the copper containing sheet so that said sheets are basically held in place by the hydraulic pressure exerted on the sheet, once the structure is submerged. The new method avoids all the disadvantages of the more common use of toxic paints, as the surface will have a lower degree of roughness, be smear-free, offers long-term protection, eliminates the environmental hazards and further protects the surface from other effects of its contact with water.
IPC 1-7
IPC 8 full level
B63B 59/04 (2006.01); C23F 13/02 (2006.01); C23F 13/04 (2006.01)
CPC (source: EP US)
B63B 59/04 (2013.01 - EP US); C23F 13/04 (2013.01 - EP); C23F 13/06 (2013.01 - EP); B63B 2221/10 (2013.01 - EP US); B63B 2231/12 (2013.01 - EP); C23F 2213/31 (2013.01 - EP)
Citation (applicant)
- EP 0562441 A2 19930929 - NGK INSULATORS LTD [JP]
- EP 0562442 A2 19930929 - NGK INSULATORS LTD [JP]
- US 4987036 A 19910122 - MILLER KEITH E J [GB]
- DALE T. PETERS: "Review of Copper-containing-Nickel Alloy Sheathing of Ship Hulls and Offshore Structures", COPPER-CONTAINING DEVELOPMENT ASSOCIATION
Citation (search report)
- [X] EP 0364630 A1 19900425 - ANDOE GRAHAM C
- [X] EP 0550766 A1 19930714 - NAKAGAWA CORROSION PROTECT [JP]
- [A] WO 9943618 A1 19990902 - PENTEL KK [JP], et al & EP 0985639 A1 20000315 - PENTEL KK [JP], et al
- [A] EP 0468739 A1 19920129 - DAIKI ENGINEERING CO [JP]
- [A] FR 2256072 A1 19750725 - ZONDEK KLAUS [CL]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00440142 A 20000516