Zinc anodes

It is well-researched fact that when dissimilar metals are immersed in an electrolyte (Seawater, brackish river or lake water), corrosion occurs. Whenever the construction, craft usually have dissimilar metal under water, such as rudders, shafts, propellers and the associated fittings. Many of these parts are expensive and Cathodic Protection is the least costly method of protecting them.

Wooden, G.R.P., Alloy and Steel Craft can all benefit from corrosion control. The most important & internationally accepted standard for the manufacture & performance of Zinc Alloy Anodes is the U.S. Military Specification No.18001H.

Our Zinc Alloy Anodes conform to this specification and are made in accordance with ISO9002. Simple to fit for all boats. The Anodes indicated in this catalogue are a small part of this range. There is an Anode for every craft. Please send a sketch and specification details of your boat if you are in doubt about the best method of protection for specific craft.

Stud fixed type anodes Two designs are offered, one with the fixing holes in lugs at each end and the other with the holes in the body of the annode. In all cases the mounting hole centres are 200mm apart which is standard in Ireland and Britain and commonly found throughout Europe. Fixing holes are for flat fasteners (e.g. hex-head bolts or nuts) rather than countersunk. Larger size annodes also available to order   No. Ref. Anode Dim. Weight 172214 B2BIS 150x50x20mm 1.2kg 172215 F3 150x90x40mm 2.4kg 172216 FX-3 290x55x30mm 3.2kg 172217 FX-5 325x80x35mm 4.2kg Propellor shaft anodes Balanced to provide maximum protection for the propeller and shaft. Designed to give continuous protection until they are 80% consumed. They have been designed for the boat owner and yachtsman who is concerned with the problem of drag. Can be fastened with any bolts & nuts of correct size. No. For Shaft Dia. 172230 22mm 172218 25mm 172219 1" 172220 30mm 172221 32mm 172222 35mm 172223 38mm System Selection Guide Design Formula: Length water line LWL x (Beam + Draught) = Wetted Surface Area. For Medium Displacement yachts, the Wet. Surface Area can be reduced by multiplying by 0.75. For Light Displacement yachts a multiplication factor of 0.50 can be used. Wetted SurfaceArea (ft.sq) Quantity & Type Anode Scheme Life 0-150 2 x F3 1 Year 150-300 2 x FX-5 or 4 x F3 1 Year 300-550 4 x FX-5 1 Year 550-800 6 x FX-5 2 Years 800-1100 12 x FX-5 1 Year Recommendations for larger craft available on request More Anodes

Button Type Anodes Circular button type annodes with single fixing stud hole to take studs. No. Size Weight Stud 172224 110mm 0.85kg M8 172225 140mm 2kg M10 Backing sheets For use when stud fixed annodes are fitted to wooden or GRP hulls. 270129 For use with B2BIS & F3 270130 For use with FX-3/FX-5Fixing Studs   No. Dia. O/all Lgth Thread Hull   - - 8mm Steel 270125 1.1/2" - 10mm Steel   - - 14mm Steel 270126 2" - 16mm Steel   - - 8mm GRP/wood 270127 - 4.1/2" 10mm GRP/wood   - - 14mm GRP/wood 270128 - 6" 16mm GRP/wood