How to Galvanize Metal (for Rust Protection)

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Introduction: How to Galvanize Metal (for Rust Protection)

We show you how to galvanize metal objects to protect them rust.

First we get 30g of zinc sulfate and dissolve it into 100mL of water.

Zinc sulfate was made back in our video on making a copper sulfate and
zinc battery: http://www.youtube.com/watch?v=Id3tL2iI0Vw


Then connect the item you want to galvanize to the negative terminal of a 5 volt power supply. Connect the positive terminal to a strip of zinc metal.


Zinc metal was obtained from our video on getting useful materials from batteries: http://www.youtube.com/watch#%21v=knc1lSupAwQ

Immerse both electrodes into the zinc sulfate solution and keep them from touching. Then turn on the current and run it for about one minute to give the metal a zinc coating.

Remove the object and now it's galvanized.

To test the rust protection, place it on top of a paper towel soaked in saltwater. You should also place an unprotected item next to it for a good comparison. Cover the towel to prevent evaporation and wait a day or two.

The treated object should remain rust-free, perhaps developing a white crusty coating. The untreated object should start to rust.


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    19 Comments

    hi, this article terms your process "anodization", not "galvanization". It describes galvanization as a non-electrical process. Which terminology is correct? thx

    http://www.wikihow.com/Prevent-Metals-from-Corroding

    Thank you for sharing your knowledge.

    Question: if I want to deposit a thin layer of copper on a small area of an aluminum sheet for Pb/Sn soldering purpose, do you think it would work?

    i didn't see the videos. the plate on positive contact, what kind of metal did u use?
    can i use any galvanized metal?

     Awesome!  Would it be in my best interest to galvanize homemade knives, like machetes?

    Never galvanize any eating utensils as there are electro-chemical processes involved when in contact with foodstuff. This gets aggrevated by heat, be CAREFUL!!!

    hmm, i don't know enough about the proper maintenance of non-stainless knives to really answer that question. Might be better to get information from sources dealing with smithing and similar trades.

     I'm sure the zinc would come off of the cutting edge the fastest, but the rest of the blade would be protected... might be wrong, but some protection is better than none.

    You could just cover the cutting part of the blade during the treatment with tape, then remove it after. Most of your blade would be galvanised and the cutting edge would too, "thanks to the negative charge", as the author of this instructable would say.

    Excellent instructable, will try this out for myself. @rimar2000 will also try your idea. sounds good for larger objects, will try it and see what happens. Thanks again

    is it possible for the zinc to react with the object its galvanizing?