Letter 7067

Stop corrosion of aluminum air cylinder

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I am working with an application that is forcing DI Water through an aluminum air compressed cylinder that has a Nitrale o-ring. The cylinder that is made of Aluminum will corrode within a day or two. What can I do to stop this? Do you know where I could send my cylinders to and have a coating applied that will be compatible with Deionized Water, Diethylene Glycol, Dowanol PNP, Glycerin, Surfynol 465?

stephen anderson
- franklin,TN, US

Electroless Nickel , Electroless Nickel Teflon, Anodize with teflon seal are the coatings I would evaluate.I reccomend the teflon because it makes the surface hydrophobic and DI water is very corrosive.

Todd Osmolski Charlotte Plating, Inc. Charlotte, NC USA

U can find about plating in ASM surface finishing handbook.

Chua Kok Siong
- Singapore

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