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
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
Circular button type annodes with single fixing stud hole to
take studs. 
