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Experimentation defines electroless nickel technology company that prides itself on trying new things and testing new products.

We are using ion exchange treatment for wastewater from nickel-chrome and zinc plating. The metal rinses are passed through the ion exchange process to remove the presence of nickel, hex chrome and zinc metal ions. The “clean water” is re-used to rinse our plated parts, but we find that it attacks the bright zinc finish. What kind of characterization do we need to do to identify the pollutants that cause this?

The Electroless Nickel Conference 2023 takes place Sept. 26-29th in Milwaukee, Wisconsin.

My concern centers around the alkaline cleaner stage. Current practice has been to dump this stage as is. Just before the last dump, I checked the pH and found it to be 12.7. I checked our wastewater discharge permit and the only pH limitation it has is that it prohibits pH less than 5.5. In other words, it has no upper pH limit. At my two other jobs, we were told discharging a wastewater of that high pH was “illegal according to EPA.” Since my discharge permit gives me no upper pH limit, am I OK?

Question: We use a bleach solution to treat cyanide and a caustic solution to raise pH in our wastewater pretreatment system.

The National Association for Surface Finishing has released its monthly Policy Update, summarizing some of the pertinent regulatory developments and new announcements from the month of September.

Question: We are having an ongoing “battle” with our local sewer district over wastewater monitoring cyanide results.

As the finishing industry begins to move away from the use of hexavalent chromium to trivalent chromium, what factors should finishers consider as they make new investments? Mark Schario, chief technology officer for Columbia Chemical offers a helpful overview of this complicated topic.

Visit ACM/ResinTech's booth at SUR/FIN 2021 to learn more about the company's environmentally-friendly water treatment systems and services

Cortec Coporation’s VpCl-396 coating system is designed for applications where an anticorrosion primer and topcoat is needed to protect metal substrates.