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Re: phosphoric acid ("metal etch")

To: "Westerdale, Bob" <bwesterdale@edax.com>
Subject: Re: phosphoric acid ("metal etch")
From: "James A. Ruffner" <erl@virginia.edu>
Date: Mon, 05 Jun 2000 20:46:40 -0400
Cc: "'Z27407@aol.com'" <Z27407@aol.com>, mgendron@speakeasy.org, triumphs@autox.team.net
References: <D532BD4F055ED2119E8300A0C9E1C8CE40F8C2@EDAXNJ05>
You are correct.  Vinegar is just acetic acid, and quite dilute.  It does not
neutralize the phosphoric acid, simply as you say, dilute it.  Neutralization
requires a base, which is what baking soda provides.  You could equally well use
lye, but I would stay away from that.



"Westerdale, Bob" wrote:

>         I believe vinegar is largely Acetic Acid. I do not think you are
> actually neutralizing the Phosphoric acid, but probably diluting it enough
> so it doesn't react badly later....
>         Bob Westerdale
>
> In a message dated 6/5/00 12:23:56 PM Eastern Daylight Time,
> mgendron@speakeasy.org writes:
>
> << How thoroughly must the phosphoric acid be removed prior to priming,
>  and how is this best accomplished? What happens if phosphoric acid
>  gets into a seam? Will the paint be ruined?
>   >>
> Vinegar is a great neutralizer of phosphoric acid...  I use OzPho and follow
>
> up with Vinegar..  Heck, for a gas tank I take all of mine to the muffler
> shop and let 'em soak overnight in their vats..
>
> Paul Cordts
> Custom Cars, Inc.


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