Re: [MV] Help! Muriatic acid and aluminum don`t mix!!

From: ALEJANDRO CHAVEZ (achavezv_gm@yahoo.com.mx)
Date: Mon Sep 27 2004 - 19:22:59 PDT


I have two wiper arms but they are fo a humvee, bad
plastic bushings I wanted to buy the bushings only,
sombody said that dont sell alone so I buy the
assembly
If they fit you can use it

Alejandro

--- Krogerma@aol.com escribió:
> Hello all:
>
> I need a bit of help again.
>
> I`m getting the deuce ready for inspection for the
> year by fixing a few things that recently broke.
> Thanks to the list for advice on the windshield and
> the PARKING brake. Thanks to Ross Moir for the nifty
> new horn. Thanks to NAPA for the flex pipe.
>
> My usual pattern of behavior when fixing something
> on my trucks is to clean, sandblast, rebuild,
> reweld, restore, repaint, etc., everything I take
> off in order to do the repair. I really just don`t
> feel right putting rusty or otherwise delapidated
> stuff back on.
>
> I quite often put rusty STEEL parts in muriatic to
> dissolve the rust (Actually I use a muriatic acid
> bath followed by a water bath, followed by a dilute
> sodium hydroxide bath to stop any residual etching,
> followed by a water bath, followed by a paint
> thinner bath). Then I apply paint and/or Texaco
> Rustproof Compound "L" and\or undercoating right
> away to avoid further oxidation of freshly exposed
> metal.
>
> I was doing my usual thing with the taken-apart
> windshield wiper assembly from my taken-apart
> windshield assembly by bathing the rusty bolts. They
> came out great, as usual. Then I noticed that the
> windshield wiper arm was rusty, too, up under where
> the spring was. OK, no problem, I`ll soak that, too.
> Well, I soaked that, too. Boy, you should have seen
> that thing bubble and smoke! I thought to myself:
> "Gee, I guess it`s good I`m doing this, there must
> have been a lot of rust up there." A couple of
> seconds later, I heard a snap and looked down to see
> that the spring underneath had detatched itself and
> was lying in the bottom of the pan. After stopping
> the etch, I investigated further and discovered that
> part of the arm that the spring was attached to was
> eaten away by the acid. Part of the arm was
> pot-metal and I hadn`t noticed. DUH!!
>
> Bottom line is that I need a windshield wiper arm.
> Where should I get one? BTW, I adapted an 11-inch
> Trico winter blade to that wiper arm just before I
> destroyed it. Drill out the dimple that holds the
> blade mount on the arm and it will come off leaving
> just the flat metal bar. There is a hole in the end
> that you can put a small screw through to fasten
> nicely to one of the adapter thingies that comes
> with the new blade.
>
>
> Cheers!
> Kurt Matis
> Troy, NY
>
> 1972 AM-General m35a2
> 1963 Walter FNBS (not an MV, but a very cool truck)
>
>
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