No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Chrome steam

We have a Dilute Chrome Seal that contains 250 grams of Chromic acid flake, and 200 grams of Sodium Chromate. The temperature is at 197 degrees F.

My question is: Does the steam that comes off this tank contain chrome? Should I have a scrubber hooked up to it or what?

Randy Mattson
- Seattle, Washington, U.S.A!

Well, you should have an exhaust ventilation system, both because the steam should be exhausted and because chromic acid is a "Class A" chemical which is supposed to be exhausted regardless of concentration.

However, the distillation principle tells us that the chromium does not evaporate with the water. Whether any chromic acid droplets are entrained by air agitation ⇦ huh? or other mechanisms, though, is less clear. Due to the methodology established in the development of the chromium MACT standards, it should be a pretty straightforward procedure to analyze the exhaust stream and make a determination.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Need quick confidential answers? $25
Need project assistance? $100/hr.

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: