"Whether steel or aluminum, both metals are
well below copper on the galvanic scale, and using bronze or copper
in contact with either is a no-no! Perhaps the epitome of this
is the very famous designer who, early in this century, built
a large and expensive racing yacht of aluminum plating on bronze
frames. The vessel barely lasted a year, much to the surprise
and dismay of the designer and owner!" "So, no bronze
seacocks, no copper bottom paint, and don't drop any pennies in
the bilge of an aluminum yacht!" By
Applying antifouling paint to an Aluminum
Using Interlux Yacht Paints/taken from "Boat
1. Degrease the surface with Fiberglass Solvent wash 202 or special
2. Bring metal to a uniform bright finish by sandblasting with non-ferrous
blast media such as clean silica sand or, if blasting is not possible,
grind using 36-grit wheel. Remove blast or sanding residue with clean
air or a broom.
3. Within one hour of blasting or sanding apply the first coat of
Interprotect 2000E/2001E. If more than one hour has passed, apply
one thin coat of Viny-lux Primewash 353/354 thinned 25% with Viny-lux
Solvent 355 prior to application of Interprotect.
4. Apply a total of four coats of Interprotect 2000E/2001E. Apply
five coats over riveted boats and welded areas.
5. Apply 2-3 coats of Trilux 33, or Tri-lux II
For more information visit Interlux yacht paints at
Using E paint from their web site.
Abrading the aluminum to white metal finish (sspc/sp 5 or nace #1)
to produce a 2-3 mil profile is standard procedure for preparing aluminum.
This can be done with abrasive blasting using natural mineral abrasive
or mechanical abrasion with 80 grit aluminum oxide paper. Immediately
following preparation you must remove any dust and debris then overcoat
with a corrosion inhibiting two-part high build Epoxy primer like
EP-PRIME 1000. When the primer in soft to finger pressure but tack
free apply three coats of EPZO antifoulant @ 5-7 wet mils per coat
following the E Paint Company Technical data sheets information regarding
dry to recoat times. (Dry to recoat time four hours at seventy degrees)
For more information visit E Paint at EPaint.net They have a question and answer forum with useful information.
Always use the recommended personal protective equipment (PPE) specified
on the can label. Consult your local fiberglass repair shop.