March 25, 2004
After finishing my rudder tonight, I decided to alodine my
H.Stab spar. I wish I would have done
this to my other spar, but I didn't. Hope this tip helps those
who, like me, want to alodine and prime
for the best corrosion protection. (I'm only priming my skins,
not alodining them)
I used the box my H.Stab spars were shipped in. Then, just layed
in a sheet of 3mil plastic, from
a roll I got at the home store. Filled it with about 2 gallons of
Alumiprep, scrubbed, rinsed, then
repeated with alodine (using a fresh sheet of plastic). The
way I was able to drain the alodine
was this....before I started, I drilled a 1.5" hole in the bottom of
the wood box, and poked my finger
down through it, pushing through a little excess plastic. After
etching and alodining was done, I stuck
a spike down through the plastic in the hole area, and with the dimpled
down plastic, it acted like
a funnel, draining right back into my 5gal buckets. Then I
dabbed off the excess acid with paper
towels and then rinsed the spar with 2 or 3 buckets of water, with the
first one being scrubbed
with a sponge. Now it's a nice gold colored spar of Alodine 1201.
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