Galvanic action can be hastened by the presence of stray electric currents. Batteries
or any other sources of electricity should be disconnected when not in use.
Due to the electrolytic action between dissimilar metals, all fittings and fasteners
attached to an aluminum hull should be aluminum or stainless steel. The use of
nickel, brass or ferrous fittings and fasteners may result in aluminum corrosion if
the fitting or fastener contacts the aluminum. If nickel, brass or ferrous metals must
be attached to aluminum, then the surfaces should be insulated with a non-wicking
gasket, tape or sealant. Fasteners should be insulated by using nonmetallic sleeves,
bushings and washers.
1. (Temporary repair.) Clean around head of rivet with wire brush. Apply a good
marine seal or similar type sealer around the head.
2. (Retighten). Use steel hammer and a bucking tool. (Steel block) Shaped to fit the
head of the rivet. Place bucking tool against rivet head and strike flattened end of
rivet inside hull with steel hammer.
1. (Temporary repair.) Drill out remainder of rivet using drill slightly larger than
original rivet. Dip sheet metal screw in sealer and insert.
2. (Permanent repair) Drill out remainder of rivet and install an over
sized aluminum rivet. (Pop rivets cannot be used where a water
tight seal or structural fastener is needed.)
1. Pop rivets are used to fasten castings and other trim. Remove by inserting small
punch through center hole and tapping out the center core.
2. Drill out remainder of the rivet.
3. Replace with pop riveting tool and pop rivet.
Lund-09.indd 4 7/9/10 1:54 PM
https://www.boat-manuals.com/
To Next Page
Loading...