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 (a) Corrosion protection for the hull shall be provided by type ZHC zinc anodes.
(b) Calculate the quantity of hull anodes required for 2 years of protection.
N = 6.5W/1000; where N = the number of ZHC anodes and W = the total wetted surface area in
square feet.
(c) Internal bilge areas shall be protected by 1 square foot of exposed zinc surface for each 200
square feet of coated surface or 50 square feet of bare metal. Anodes of type ZHC shall be used.
CAUTION
The nature of aluminum boats merits special attention for mooring locations, particularly next to
steel ships, boats, buoys, and piers. Under these conditions it is essential that non-conducting
mooring lines and insulating camel sections be used to prevent electrical contact of the aluminum
hull with a steel structure since this could result in galvanic corrosion of the aluminum hull.
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