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Experimentation proved valuable for Rightway Fasteners. It saved money on sludge disposal costs simply by changing the coagulant in its zinc waste treatment...

E-coat can produce uniform finishes with excellent coverage and outstanding corrosion resistance.

Over the last several months, we have had difficulty with calibration of our pH sensors, particularly the pH adjustment sensor that controls pH in the range of 9.1– 9.5 for precipitation. Somehow the sensor still works well enough for us to achieve metal precipitation to maintain compliance, although our effluent’s metal concentrations are a little higher than in the past. We feel very uncomfortable continuing this way. Any ideas to help?

Question: I am inquiring about your answer to the question Chemfilm Disposal , published in the September 2004 issue.

A guide to lowering pollution and recovering valuable process constituents.

Where could I find a solubility versus pH chart for zinc?

Question: We are planning to install an anodizing system at our facility.

The new Advanced Metal Finishing facility—$67 million of plating technology and safety —was unveiled with a ceremony and public tours, but it won’t be fully operation until the end of this year when work transfers slowly from the older, adjoining AMF building.

Question: We have a captive, acid zinc plating operation at our facility.

Automated processing can improve quality, reduce waste.