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With this method you can oxidize most iron objects very quickly. It can be used for art or even just for fun! It will provide a nice rusty layer on top, but be warned if left in too long it can end up rusting the container, and eating the object.

WARNING: In this instructable you will be using bleach. BLEACH CAUSES SEVERE BUT TEMPORARY EYE INJURY. MAY IRRITATE SKIN. MAY CAUSE NAUSEA & VOMIT IF INGEST. EXPOSURE TO VAPORS/MIST MAY IRRITATE NOSE, THROAT & LUNGS. Emergency/First Aid Proc: EYES: IMMEDIATELY FLUSH EYES WITH PLENTY OF REMOVE CONTAMINATED CLOTHING. WASH AREA WITH WATER FOR AT LEAST 15 MINUTES. INGEST: DRINK A GLASSFUL OF WATER AND CALL MD. INHALE: IF BREATHING PROBLEMS DEVELOP REMOVE TO FRESH AIR.

DO NOT MIX BLEACH WITH HOUSEHOLD CLEANERS, ESPECIALLY AMMONIA, AS IT CAN CREATE TOXIC/DEADLY CHLORINE GAS.

Step 1: Materials

The materials are very simple:
A container for growing rust (May not be needed as you could just pour the bleach directly on the surface, but it may dry too quickly),
An Iron object (I use nails, but you can use anything that rusts),
And Bleach.
<p>How long does the experiment take?</p>
a better way do do this is to put 1 part bleach and 1 part vinegar, leave it for a few days, all the rust will settle in the bottom and just use coffee filters to extract it.
<p>For anyone who doesn't know, this what this troll is suggesting could very well kill you. Bleach contains chlorine, which is released as a gas when mixed with an acid such as Vinegar. The chlorine fumes will stink to high heaven and give you a fair warning, but even still don't do it.</p>
<p>after 4 weeks mine grew to 3 times the surface area and looked really ugly :) have a look</p>
<p>about how long does it take to rust?</p>
If you want rust, electrolysis is faster again.
Its very fast usually starting to collect a visible layer of rust in only a few minutes.
willt he bleach evaporate, leaving behind pure rust/iron?
It really depends on the environment it is in. If you are in a nice dry area, like a desert, then it will evaporate as long as it is not covered. although it may take a few days.
Muratic acid makes ferrous metals rust quickly as well.
I would try it out but I don't have any. But thanks for the suggestion.

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