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#4202140 - 09/13/16 04:40 PM Re: Undercarriage Rust Management [Re: OpenClose]
Michael_P Offline


Registered: 08/20/07
Posts: 1765
Loc: .
Ive been blasted for this in the past, but here goes my rust preventative concoction which I have used for many years stopping rust in Ohio winters very successfully:

10 Toilet bowl wax rings (the cheap ones)
2 gallons of kerosene (AKA liquid paraffin)
2 quarts of new 30 ND motor oil
1 pint of boiled linseed oil

You can let the wax rings which are loaded with corrosion inhibitors dissolve in the kerosene or heat up with a non incendiary source at low heat. Mix it all together and it will spray well.

*People have told me this mix has a low flash point and will combust at the slightest spark or heat source. I have held fire to sprayed metal with no more combustion than undercoating.
*Others have said this mix does not have years of research backing it and will not do an adequate job. So far, it has kept my vehicles, trailers and implements rust free.
*Some have said the drying process of the linseed oil (which is a small percentage of the mix) will heat up and light off. After spraying on metal, I have not noticed a difference in temp using an infrared thermometer of more than 5 degrees.

You obviously don't want to spray it on exhaust components as with any rust preventative oil. I also keep it away from the rubber parts as much as possible. An hour after application, you have a thick, waxy, tacky film protecting your metal parts. If you park your vehicle in an attached garage, your house will smell like linseed oil so leave it out for a week or so.

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#4202241 - 09/13/16 06:39 PM Re: Undercarriage Rust Management [Re: Michael_P]
Ducked Offline


Registered: 10/25/12
Posts: 3436
Loc: Taiwan
Seems reasonable, though I'm a bit unsure about the wax. I'd expect it night form a hard skin, and perhaps trap water (like paint) but maybe the other stuff keeps it pliable. Academic for me anyway since I doubt you can get it here (and I wasn't aware of it in the UK.) I'd have to melt candles.

BTW "liquid paraffin" describes a pharmaceutical grade laxative, not kerosene, in British English anyway. Paraffin (without the "liquid") is used to describe kerosene. Your dialect may vary.

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#4202340 - 09/13/16 08:36 PM Re: Undercarriage Rust Management [Re: OpenClose]
Michael_P Offline


Registered: 08/20/07
Posts: 1765
Loc: .
That was intended for those across the pond. Good point Ducked.

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#4202787 - 09/14/16 01:30 PM Re: Undercarriage Rust Management [Re: OpenClose]
buck91 Offline


Registered: 04/17/12
Posts: 2344
Loc: West Michigan
Paraffin is a synonym for kerosene in England? Not quite sure I understand this one... Paraffin is a type of wax, no? And kerosene is, well, kerosene. A combustible hydrocarbon.
_________________________
2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop

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#4203176 - 09/14/16 09:47 PM Re: Undercarriage Rust Management [Re: buck91]
Ducked Offline


Registered: 10/25/12
Posts: 3436
Loc: Taiwan
Originally Posted By: buck91
Paraffin is a synonym for kerosene in England? Not quite sure I understand this one... Paraffin is a type of wax, no? And kerosene is, well, kerosene. A combustible hydrocarbon.


Depends whether you're talking as a chemist or as the geezer in the hardware store.

Paraffins are longish chain saturated hydrocarbons, so they can be waxes or liquids, depending mostly on the chain length.

Kerosene is mostly made up of liquid paraffins of varying chain length, up to about 15, though it has some ring compounds in it as well. In common usage its referred to as "paraffin" rather than kerosene in the UK, though the latter term is known.

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#4203195 - 09/14/16 10:12 PM Re: Undercarriage Rust Management [Re: Michael_P]
Ducked Offline


Registered: 10/25/12
Posts: 3436
Loc: Taiwan
Originally Posted By: Michael_P
Ive been blasted for this in the past, but here goes my rust preventative concoction which I have used for many years stopping rust in Ohio winters very successfully:

10 Toilet bowl wax rings (the cheap ones)
2 gallons of kerosene (AKA liquid paraffin)
2 quarts of new 30 ND motor oil
1 pint of boiled linseed oil



Similarly to the wax, I'm a bit unsure about the boiled linseed oil. This is unstable, which is of course why it works as a paint. It'll set relatively quickly, though this process may be slowed (or perhaps prevented from completing altogether, don't know) by the other ingredients.

In this context I think it MIGHT be desirable to use something more stable, which will set more slowly. Castor oil is probably the most stable generally available vegetable oil (which of course is why it works as a 2-stroke oil) but its fairly expensive.

Canola oil is relatively stable, and its non-GM ancestor rapeseed oil was (is?) used as an industrial lubricant, notably in marine steam engines where it was said to be especially resistant to wash-off. I've used it as a tyre treatment (a whole other, and much dodgier area of experiment) but havn't tried it as a rust proofer.

I've used old sunflower oil because I had quite a lot of it. Its not as stable as Canola, but its more stable than linseed, and its cheap, so a compromise.

All the vegetable oils potentially grow mould, especially in enclosed spaces, though the other ingredients may suppress this to some extent.

Soy bean oil seems especially bad for this so I no longer use it.


Edited by Ducked (09/14/16 10:13 PM)

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