Metal finishing Q&As since 1989

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The effects of chlorine on 5454 type aluminum, buffed and anodized

We manufacture wheels using 5454 type aluminum. We then send them to a buffing and anodizing supplier. We perform a leak test by dipping the wheel into a tank of water. Our problem is the water,over a period of time, produces algae and slime on the sides of the tank and the water becomes cloudy. We want to put chlorine tablets in the water to reduce the algae and slime and make the water clearer. Will chlorine affect the final product after it has been buffed and anodized?

Doug Miller
ATV Aluminum Wheel Manufacturer - Timmonsville, South Carolina
2004

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Based on my swimming pool, chlorine is a very poor preventer of algal growth. you need an algecide. I would not suggust that you use the common copper based ones as it might harm your wheels. Check with a pool supplier for a totally organic based one. another cheap option that will actually help the drying after the dip is to use a 1% isopropyl alcohol [on eBay or Amazon] mixture, which is not very expensive.(if bought in 5 gal or larger containers). An ultra violet light will also help retart the growth.

James Watts
- Navarre, Florida
2004

I would not do it, I have read several postings talking about chlorine causing pitting in surfaces and causing dis-color. Clean your tank and change the water often, don't take a chance.

Michael Balda
- Prophetstown, Illinois, USA
2004

Stagnant water presents another major concern, legionaires bacteria. Addition of chemicals will require disposal methods--suggest daily changes of the water.

BILL BASSETT
- Brandon, Mississippi
2004

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Water is cheaper than algaecide. Dump and clean your tank. If you drain and then disinfect it with household bleach [adv: bleach/sodium hypochlorite in bulk on eBay or Amazon] , it will delay the growth of new algae. Don't disinfect it and the algae will be back in a few days.

Jeffrey Holmes, CEF
Spartanburg, South Carolina
2004

Use a small carbon filter - like a fish tank, but no fish. Keep the tank in the dark as much as possible. Use a little bleach or fish tank store anti-algae solutions (if compatible). We have a tank leak tester for enclosures also.

Edward Doherty
instruments - Coral Springs, Florida, USA
2004