As an Amazon Associate & eBay Partner: we earn from qualifying purchases
Mr. Rogers: "Look for the Helpers. You'll always find people who are helping."

finishing.com -- The Home Page of the Finishing Industry

-----

Algae, and Ventilation of Boric/Sulfuric Anodizing BAC5632

Q. Not many people run Boeing's Boric-Sulfuric Anodizing process (BSAA), but I am hoping that someone who does may be able to offer advice...

The BSAA is known for producing algae. Boeing recommends a benzoate additive as an algicide, but that only works in the tank. The wet scrubber recirculation system still develops the algae and it eventually requires periodic and time-consuming clean out to remove the algae from the media. I thought of adding a benzoate feed pump to the scrubber recirculation system, but I was wondering if anyone else has a different solution for this algae problem in the scrubber.

Jon Barrows, MSF, EHSSC
Kansas City
September 15, 2025

Q. I am hoping that someone has solved this issue specifically for BSAA. Benzoate feed at the scrubber sump does not appear to be helpful in preliminary tests that were run, but perhaps I need to make adjustments.

Jon Barrows, MSF, EHSSC
Kansas City
September 25, 2025

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: