Rust on hood
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This is a discussion on Rust on hood within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; quick question, will my hood rust? im quessing no cz aluminum. thakns...

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    Rust on hood

    quick question, will my hood rust? im quessing no cz aluminum. thakns

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    Registered User blarg's Avatar
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    no
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    Registered User afbluesv1k's Avatar
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    I know that it not nice to say. I should pull out my chemistry book from 4 years ago, but I will just give a short explanation. Aluminum doesnt rust like steel does, or at least at the same rate. Oxidation or combining with oxygen is what rusting is, also know as iron oxide. Corosion on aluminum is aluminum oxide, but happens at a much slower rate than steel. So to say that its not going to break down is not true, but the finish on aluminum lasts far longer. HOWEVER!!!! Comparable thickness of steel to aluminum, Al is a weaker metal, so it does dent easier.

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    Registered User tarbaj's Avatar
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    Quote Originally Posted by afbluesv1k
    I know that it not nice to say. I should pull out my chemistry book from 4 years ago, but I will just give a short explanation. Aluminum doesnt rust like steel does, or at least at the same rate. Oxidation or combining with oxygen is what rusting is, also know as iron oxide. Corosion on aluminum is aluminum oxide, but happens at a much slower rate than steel. So to say that its not going to break down is not true, but the finish on aluminum lasts far longer. HOWEVER!!!! Comparable thickness of steel to aluminum, Al is a weaker metal, so it does dent easier.

    To add to this once a layer of oxidized Al is covering the top of the surface the oxidation is finished. It actually is stronger than pure Al if I remember my Chemistry correctly.
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    Registered User afbluesv1k's Avatar
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    Quote Originally Posted by tarbaj
    To add to this once a layer of oxidized Al is covering the top of the surface the oxidation is finished. It actually is stronger than pure Al if I remember my Chemistry correctly.
    I think on a Rocwell hardness test it is but structurally I dont think it would be becuase its only on the surface.

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    Well, thanks for the replys. I asked that because i got a deep scratch and slight bend on my hood and dont want to spend 350 to fix it(quoted to fix by a bodyshop). One of my friends said it should be fine b/c its alum. so i figured i'd ask. Sorry if the question was unclear because i was in a hurry. The body shop said that even if i put touch up paint on it, it would still end up rusting b/c of the bend. Is this true?

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    Registered User blarg's Avatar
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    Quote Originally Posted by aznwrx04
    Well, thanks for the replys. I asked that because i got a deep scratch and slight bend on my hood and dont want to spend 350 to fix it(quoted to fix by a bodyshop). One of my friends said it should be fine b/c its alum. so i figured i'd ask. Sorry if the question was unclear because i was in a hurry. The body shop said that even if i put touch up paint on it, it would still end up rusting b/c of the bend. Is this true?
    it WOULD be true if the hood was steel, as most are. the body shop probably doesn't know the hood is aluminum, and I don't know if I'd want someone who doesn't know that to be working on my car...and if he does know its aluminum and thinks it will rust then run....run far far away.
    ScoobyDMC #009 - making dirty jokes since before you were making dirty diapers.
    Quote Originally Posted by Blarg
    go f*** yourself

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