Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

What is dross made of and how is it removed

Hi, I am Paul Paine, am nearly 70 years old, and have been told I am creating hazardous waste. I want to know the truth. I cut new soft steel with a plasma cutter and then pickle the piece in a dilute mixture of hydrochloric acid to remove mill scale and dross. The dross turns brown and can be flicked off easily. Can anyone tell me what chemical compound the dross is? If I buffer the acid mixture with soda before disposal, am I creating a hazardous waste?
Thanks

Paul Paine
Graybeard Paine - Claremore, Oklahoma
2007

(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: