Rust Neutralizer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bw4sale · 04-02-2007, 09:28 AM

The steel plate that the battery sits on in my lawnmower is trying to rust. My dad said you can pour baking soda and a little water on the rust to neutralize it, then spray it with Rustoleum Rusty metal primer and then paint. Anybody ever heard of this? Does it work? thanks.

65-72 chevytoys · 04-02-2007, 09:32 AM

Yes baking soda is a acid neutralizer. If I remember my chemistry right you get sodium bicarbonate and a few other harmless by products then rinse and paints like you mentioned.

**WorkinLonghorn** · 04-02-2007, 11:00 AM

There's a better way and that is to rinse the area with lots of water and then apply "Naval Jelly" which is phosphoric acid. It forms a hard compound with the actual rust that is paintable and stronger than what was there. We used to use it all the time on an old steel ship I lived on and I can attest to it's value in restoring rusted areas to paint-worthiness.-Brian

shifty · 04-02-2007, 11:02 AM

Quote:

Originally Posted by WorkinLonghorn

There's a better way and that is to rinse the area with lots of water and then apply "Naval Jelly" which is phosphoric acid. It forms a hard compound with the actual rust that is paintable and stronger than what was there. We used to use it all the time on an old steel ship I lived on and I can attest to it's value in restoring rusted areas to paint-worthiness.-Brian

But, if it's the battery acid causing the corrosion, and you add another acid (Naval Jelly) to the mix without neutralizing, is that actually going to help?

**WorkinLonghorn** · 04-02-2007, 02:43 PM

Good question Shifty.I don't know if any of the acidity would remain after rinsing. Rust itself is not acidic as you know, but I suppose I'd neutralize it just in case,then use the phosphoric.
Here's a link:http://www.corrosion-doctors.org/Met...-converter.htm

piecesparts · 04-02-2007, 03:24 PM

Applying the theories of acids and caustics. The acid from a battery is very low on the Ph scale and the soda from baking soda is very high on the Ph scale--so they cancel each other out. I would first kill the acidic effects of the battery acid and then do the naval jelly thing. To seal the metal, I would look at a plastic based material or even get the piece covered with a rubber material like Rhino Lining or any other rubber based bedlliner.

04-02-2007, 09:28 AM	#1
bw4sale Registered User Join Date: Sep 2006 Location: Hendersonville, TN Posts: 1,528	Rust Neutralizer The steel plate that the battery sits on in my lawnmower is trying to rust. My dad said you can pour baking soda and a little water on the rust to neutralize it, then spray it with Rustoleum Rusty metal primer and then paint. Anybody ever heard of this? Does it work? thanks. __________________ BRENT -'68 Stepside Project -'98 Z71 Daily Driver -Enough extra parts to build another truck and a half

04-02-2007, 09:32 AM	#2
65-72 chevytoys Registered User Join Date: Dec 2006 Location: Wesley Chapel, Florida Posts: 1,113	Re: Rust Neutralizer Yes baking soda is a acid neutralizer. If I remember my chemistry right you get sodium bicarbonate and a few other harmless by products then rinse and paints like you mentioned. __________________ 2004 Chevy Silverado 1500LS SWB 5.3L 2004 Corvette Z16 #770 Wish I had not sold 72 blazer

04-02-2007, 11:00 AM	#3
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: Rust Neutralizer There's a better way and that is to rinse the area with lots of water and then apply "Naval Jelly" which is phosphoric acid. It forms a hard compound with the actual rust that is paintable and stronger than what was there. We used to use it all the time on an old steel ship I lived on and I can attest to it's value in restoring rusted areas to paint-worthiness.-Brian __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

04-02-2007, 02:43 PM	#5
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: Rust Neutralizer Good question Shifty.I don't know if any of the acidity would remain after rinsing. Rust itself is not acidic as you know, but I suppose I'd neutralize it just in case,then use the phosphoric. Here's a link:http://www.corrosion-doctors.org/Met...-converter.htm __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent. Last edited by WorkinLonghorn; 04-02-2007 at 02:46 PM. Reason: added link

04-02-2007, 03:24 PM	#6
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: Rust Neutralizer Applying the theories of acids and caustics. The acid from a battery is very low on the Ph scale and the soda from baking soda is very high on the Ph scale--so they cancel each other out. I would first kill the acidic effects of the battery acid and then do the naval jelly thing. To seal the metal, I would look at a plastic based material or even get the piece covered with a rubber material like Rhino Lining or any other rubber based bedlliner. Last edited by piecesparts; 04-02-2007 at 03:26 PM.

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