This is what happens when you cook with too much salt in aluminum cookwear.
These don't prevent corrosion. They increase the corrosion resistance. There is a difference...
I'm not familiar with alodine. I'll have to research it. If you have a link, that would be great.
Also known as conversion coating. It is applied as a liquid and then rinsed off. Where anodize is better for corrosion resistance it is also non conductive so if you need the aluminum to be bonded like on an airplane for lightning protection you use alodine on a surface to allow the part to conduct while still giving it corrosion protection. Also during manufacturing anodize might be scratched, or where the electrical contacts were placed for the anodizing process you use alodine to touch up those surfaces.
Sorry... for health reasons I need to be nerdy for just a moment.Also known as conversion coating. It is applied as a liquid and then rinsed off. Where anodize is better for corrosion resistance it is also non conductive so if you need the aluminum to be bonded like on an airplane for lightning protection you use alodine on a surface to allow the part to conduct while still giving it corrosion protection. Also during manufacturing anodize might be scratched, or where the electrical contacts were placed for the anodizing process you use alodine to touch up those surfaces.
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What is Alodine / Chem Film / Chromate Conversion Coating?
Also called chem film, Alodine is a chromate conversion coating that protects aluminum from corrosion, often used in aerospace applications.www.besttechnologyinc.com
Chrome 6 is a carcinogen, chrome 3 is safe. Chrome 7 does not exist. To convert from +3 to +6 you need a strong oxidizing agent, not acid.Sorry... for health reasons I need to be nerdy for just a moment.
The active ingredient in Alodine contains a chromium atom in the +6 oxidation state. The Cr+6 ion is rather benign (safe) however the Cr+7 ion is a potent carcinogen. You might recall the movie Erin Brockovich? That was Cr+7.
SO!!!! if you are going to use Anoline KEEP IT AWAY FROM ACIDS! or anything ACIDIC or you will create a potent carcinogen.
If you are concerned about the environment, I'd also make sure none of it gets in the drain or in the water etc. Wash off all excess and don't let it stay in contact with your skin. Don't breath any mist. The surface of your lungs contain carbonic ACID so... there is that possibility as well.
Cr+6 is also a fairly strong oxidizer and will strip electrons away from other metals and many non-metalic materials (such as fiberglass). So don't be casual with where you let this stuff drip. It will react with other things beside Aluminum and the result will be a very colorful product that will be hard to buff out
