Just wondered if anyone knows whether or not applying Iron Phosphate to the inside of a chassis would prevent it from rusting from the inside-out? Some guy from Leeds University kept mentioning it at the Classic Motor Show last weekend. Cheers, Dave

Its not really the exposed areas that rust, rather the hidden areas. Sills, arches and chassis rails rust from the inside out.

 

Arches rust between the 2 skins where condensation builds up on the inner wing running down and corroding ths spot welds.Usually cause by people not keep arch lips clean. The build up of grime will hold water longer and won't allow the inner arches to dry. Chassis rails and sills rust because water gets inside. Not sure painting the underside of the a Z will help prevent rust.

 

I think it may work on things like floor pans etc on classic cars as they are not a monocoque chassis and don't have the same hidden flitches that modern cars have.

 

The best way to keep a Z in good condition is to clean and polish it regularly with regular coats of wax. Keep the arches clean and free from buildup. In the summer, inject inner arches, chassis rails, door bottoms and flitches with a protective oil like Waxoil.

Its ZINK PHOSPHATE from my knowledge that is an anti rust treatment. My Dads company apply it to freshly stripped body shells etc once they are blast cleaned. It also provides a really good surface for primer to stick to!

 

They spray all over, not just inside,

 

have a look here for some info or give hima call.

 

http://www.blast-cleaning.co.uk

If you're having the car dipped, then it's a good idea. Has to be applied to bare metal.

youre basically talking about galvanising?

Thanks guys. It's for an old Corvette chassis. I've put the body back on it after painting the chassis, but I wondered if I could spray something inside the chassis to slow down the corrosion that will no doubt ensue in this climate!

Thanks guys. It's for an old Corvette chassis. I've put the body back on it after painting the chassis, but I wondered if I could spray something inside the chassis to slow down the corrosion that will no doubt ensue in this climate!

 

old and used engine oil would be very effective

old and used engine oil would be very effective

 

But Dinitrol would be even better:D

But Dinitrol would be even better:D

 

dinitrol is the nuts... tis was i use ;)

Thanks guys. It's for an old Corvette chassis. I've put the body back on it after painting the chassis, but I wondered if I could spray something inside the chassis to slow down the corrosion that will no doubt ensue in this climate!

 

I thought you were referring to the zed at first. All modern cars are now processed with a zinc phosphate coating prior to the first paint application. This is usually via a series of dip tanks and showers. I would have thought the Corvette would have been processed through a similar system.

 

Most modern paints have very little anti corrosion properties. They are simply cosmetic. 90% of the anti corrosion properties are in the PO4 and Electrocoat process, as both of these coatings are applied via the "dipping" process, rather than "spraying" process.

I thought you were referring to the zed at first. All modern cars are now processed with a zinc phosphate coating prior to the first paint application. This is usually via a series of dip tanks and showers. I would have thought the Corvette would have been processed through a similar system.

 

Most modern paints have very little anti corrosion properties. They are simply cosmetic. 90% of the anti corrosion properties are in the PO4 and Electrocoat process, as both of these coatings are applied via the "dipping" process, rather than "spraying" process.

 

unless you use an etch primer... which does the same effective job as phosphate coatings such as aluchrom 1200... though i think on a production line its more practical to dip which i assume is why they tend to galvanise in a molten zinc dip

wtf am i waffling on about? just ignore me peeps... im in wibble mode!

 

il be wibbling on about anodosing soon or its much underrated counterpart, the non-electrolytical alodising

 

:wack:

I think 40 years ago the Corvette's chassis would have been dipped, but all the paint has gone from the inside of the chassis. It's still solid and I just want to spray something in there to stop it from going downhill rapidly. I've heard of people mixing old engine oil with paraffin and spraying that in, but it's gonna get EVERYWHERE. Ditrinol sounds like a plan, but it might seal in the moisture and make things worse. I should have got it dipped really, but the missus wanted it moving into the new garage I've just built, so she can have her new kitchen!