Greener Anodizing Processes, Energy Efficiency Could Shrink U.S. Consumption, Incandescent-Sized CFLs

Feb. 2, 2009
Greener anodizing processes, energy efficiency could shrink U.S. consumption, incandescent-sized CFLs.

Parts makers these days are on the lookout for processes that are more environmentally friendly. One of the latest examples is in aluminum anodizing. Bonnell Aluminum, Newnan, Ga., a supplier of aluminum extrusions to the nonresidential construction market, is moving to an acid-etch process, said to be “greener” than the usual caustic etching it replaces.

Bonnell Aluminum

Bonnell says acid-etched anodic coatings have better finish consistency than those from caustic-etch anodizing. Acid etch is better at hiding imperfections in extrusion surfaces and nearly eliminates the appearance of visual streaks and die lines while giving a nice matte finish, a Bonnell spokesperson says.

The “green” aspect of the process stems from the fact that it conditions surfaces more quickly than acid etch, which reduces the amount of waste-sludge disposal by as much as 90%. In addition, the process enables the use of more recycled content in extrusion billet while maintaining a highly uniform finish, Bonnell says.

Edited by Leland Teschler

Sponsored Recommendations

The entire spectrum of drive technology

June 5, 2024
Read exciting stories about all aspects of maxon drive technology in our magazine.


May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

Solenoid Valve Mechanics: Understanding Force Balance Equations

May 13, 2024
When evaluating a solenoid valve for a particular application, it is important to ensure that the valve can both remain in state and transition between its de-energized and fully...

Solenoid Valve Basics: What They Are, What They Do, and How They Work

May 13, 2024
A solenoid valve is an electromechanical device used to control the flow of a liquid or gas. It is comprised of two features: a solenoid and a valve. The solenoid is an electric...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!