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Spent some time under the car today and treated some rust
Used a thin coating of no-ox which is is designed to stop/slow the oxidation
Signs of rust were found here
Black arm
Center bolt on a-arm
I applied a very thin coat of the NO-OX and will rather it gather a little dirt than to rust further
After photo
I will admit these are extremely minor occurences of rust but considering i may be backing those bolts out one day i would like to have them turn as easy as possible
Fortunately it was all that i could find on the entire underside of the vehicle
Not sure how long you've had the car but a number of forum posters have reported rust that develops on the rear mufflers mainly where the exhaust tips are welded. The mufflers are made from stainless steel, no doubt 409 that unlike the shinny, more expensive 18% Chrome and 8% Nickle Type 304 stainless. Type 409 does not contain Nickle and only has 12% Chrome. Info says it's Aluminized (a very thin coating of aluminum,) which keeps it silver looking much longer. However the welds and weld spatter are not Aluminized. Also the back plates of the mufflers. where the pipes are welded, gets very hot in places and the Aluminized coating is mostly gone. I used a Rust Reformer that is easy to apply and turns the brown rust a black-blue. It does nothing to non rusted areas so can be simply put on without worrying about brush strokes etc as it has the consistence of water. It's about $6 for 8 ounces. Just checked, and after also most 2 years looks about the same as when 1st applied. If interested this is a PDF of what I did: http://netwelding.com/Muffler_Rust.pdf
On my new Chevy Trax there is a clear coating on most of the underside it came from GM with that on it, why can't dealers offer this for every car and truck.
I would have paid to have the bottom of the corvette shot with this clear undercoating, it wouldn't make the mess the black stuff does.
On my new Chevy Trax there is a clear coating on most of the underside it came from GM with that on it, why can't dealers offer this for every car and truck.
I would have paid to have the bottom of the corvette shot with this clear undercoating, it wouldn't make the mess the black stuff does.
There is actually close to no rust under the vette. I was under a buddies 2005 c6 and was amazed that it looked as clear as my 14 c7
Not sure it needs a coating but a couple extremely small spots are unprotected steel .
Use S-100 Corrosion Protectant. Learned about this product many years ago while selling HD bikes. Incredible product. Just spray it on the unprotected spots under the car and you are done. Sprays on clear and absolutely stops rust. The Crusader engines on my yacht looked new after 10 years in salt water using this product. Use it on any unprotected metal that will corrode or rust. If you use it on the engine, do not spray on belts and pulleys (I protect with towel) and wipe off any excess. Do not spray on brakes.
The under side of the car DID have many area where the metals were developing a chalky white film. How well does this product work in that instance
Works VERY well to prevent the film on metals such as aluminum. Note that it was developed to prevent corrosion on motorcycles to include aluminum engines. I have used it extensively on all my HD bikes and never had a spec of corrosion on any of them. My Shelby GT500 had the white chalky corrosion in spots on the engine when I got the car. One application of S-100 and it was gone. Never came back.
If you don't want to order the product on line, then stop by any Harley-Davidson dealer and pick up a can.
Last edited by BladeSilver2015; Aug 24, 2015 at 12:58 PM.
On cars like the corvette where there isn't much that can rust, parts like bolts seem to rust even more, it seems as though rust is attracted to the bolts twice as bad.
There is nothing worst that trying to turn out rusted bolts, you can wire brush all you want, rust pits make this extra difficult.
I would feel better about driving my new cars in weather, with something on the rust prone parts.
Before you guys go down the road with rust reformer on exhaust please note that rust reformer (including Rust-0leum) should NOT be used on metal that will exceed 200 degrees. In addition exhaust will rust from the inside out first because of engine condensation. If you do not believe me call the company at 1-800-481-4785.
Before you guys go down the road with rust reformer on exhaust please note that rust reformer (including Rust-0leum) should NOT be used on metal that will exceed 200 degrees. In addition exhaust will rust from the inside out first because of engine condensation. If you do not believe me call the company at 1-800-481-4785.
Have used Rust Reformer for years on my dual exhaust systems for example on my trucks etc. Occasionally have to reapply to new areas. Was surprised when I checked and it still looks fine even after almost 2 years. The Vette exhaust is made from 409 stainless. It will probably last the life of ownership for most folks. The Aluminizing makes it look better! Attached is a graph of corrosion tests with 409 and Aluminzied 409.
If anyone is interested included a link to a PDF of what I did with a description of the metallurgy of stainless steel. Rust Reformer is easy to apply, cheap and makes it look better, has nothing to do with extending the life. The welding wire used is also no doubt 409 it's just not aluminized so the brown rust shows up quickly. In my former life we supplied a lot of 409 welding wire to exhaust system manufacturers. The PDF discusses what the product is, why it works and notes it only has a 9 month shelf life. For ~$6 buy a new container. It's your car do as you wish! http://netwelding.com/Muffler_Rust.pdf
Graph of corrosion test of 409 stainless steel, Aluminized 409 and an even better allow, 439 widely used in Europe.
Must say you are thorough and pay attention to detail.
Cars are a hobby, learned about mostly from reading a lot- Hot Rod, many other car mags and books etc since I was 12! Welding is my profession, education, worked in R&D etc etc. Don't claim to be a car expert-just a gear head enthusiast! I learn a lot from this forum and like to give back where I can!
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Treated some rust
