Sacrificial Anode
Specifications
For Marinette Aluminum
Boats
Material:
Although anodes are commonly referred to as "zincs" the proper anode
for use on the Marinette hull is actually a specially developed aluminum alloy
with the designation of KA90 or SEALLOY 150. These aluminum anodes, because of
their material make up and the processing that they go through, give the
highest protection possible. KA 90 and SEALLOY 150 were the anodes that the
boats were supplied with from the factory. Magnesium can be used, however
Marinette Yachts does not recommend its use. If magnesium is used, it can only
be used in freshwater and it will deplete at a much faster rate than the
aluminum anode, possibly leaving the hull unprotected if not monitored closely.
Commonly available zinc is too close on the galvanic scale to provide adequate
protection and should not be used. High purity zinc can be used but it is
difficult to find and does not provide as much protection as the aluminum
anode.
Attachment:
Anodes should be bolted to bare metal with Stainless Steel bolts. Do not use
wire brushes made of steel or copper alloys to strip the aluminum.
Anode requirements:
26',
28' and 29.5' Models
30"
on each side of keel
12" on each trim tab
6" on each rudder
Total single engine 7' 6"
Total twin engine 8' 0"
32'
Models
36"
on each side of keel
12" on each trim tab
6" on each rudder
Total 9' 0"
37'
54"
on each side of keel
12" on each trim tab
6" on each rudder
Total 12' 0"
39',
41' and 44' Models
66"
on each side of keel
18" on each trim tab
6" on each rudder
Total 15' 0"
KA90/SEALLOY 150
anodes are available through Marinette Yachts at 906-228-2840.