There are several mitigating factors that you mention. Moisture will accelerate corrosion. Salt will accelerate corrosion. Another factor is how deep the scratch went into the body panel. Automobiles have a protective coating applied to the steel before painting that helps inhibit corrosion - if you scratched all the way through this, and exposed bare metal, that will allow faster corrosion. On a repair note, the repair process would be the same if the scratch had corroded or not -- i.
In this "not my fault" era, it's nice to see someone taking responsibility for their actions - even if it was an accident. Hi Leah,. Depending on the climate, the steel quite easily could have rusted in days. Your location is Boston; is that where the car is too? If the car is near the ocean, the salty atmosphere only makes the steel corrode that much faster.
The chemical composition of the steel probably galvanized is not an important factor in this case because no unpainted automobile body should be expected to stay uncorroded for very long. Did the corroded area expand from a thin scratch to a bigger area in days? This is one reason why mufflers and exhaust manifolds in cars get rusty very quickly unless they are coated or made out of non-rusting materials. The rusting rate may be the same, but you may notice it sooner in thin metal sheeting than on a thick piece of iron because the former will have a hole in it sooner.
Some kinds of steel wool also rust quickly they are commonly exposed to water so this doesn't help , although other steel wools are made of stainless steel or coated.
If you have two different metals in electrical contact, and both in contact with salty water, then effectively a battery is made. Current flows, and the energy comes from the corrosion of the metals. Some companies sell blocks of zinc that you can attach to boats so that the zinc corrodes first, protecting the other metals. Vinegar and bleach have been tried and seem to affect the rusting rate. Fresh iron exposed to a hot atmosphere with plenty of oxygen and water will form a thin layer of rust immediately although if you look at a very short time after exposing the iron surface, you will have a very small amount of rust.
Any of the above variables can affect the rusting rate however. Can you think of more? I read what Tom said about the rate of rusting and stainless steel does rust! I did an experiment on rusting stainless steel and it rusted in water, salt water, vinegar, lemonade and red cordial. Beth, thanks. Indoor applications with controlled humidity and a non-corrosive atmosphere will often provide a rust-free window of a month or even longer! The air quality surrounding the steel also has a significant impact on the amount of time before rust appears.
Frequently, Holdtight is used in aggressive chemical environments where corrosion failure has been a problem due to chemical contamination. Overclockers UK Forums. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More. How long does it take rust to form? Show only OP.
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