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

-----

Testing for free iron content in acidic solutions

I currently have 2 stainless steel passivation tanks. A 21% nitric acid solution with sodium dichromate and a 50% nitric acid solution. I also have a stainless steel etch tank filled with Wyandotte DS9-314. What is the lab procedure to check these solutions for free iron? The passivation and etch are in accordance with ASTM A967.

Lawrence Cole
- Ogden, Utah, USA
2002

An A.A. unit (atomic absorption) [on eBay or Amazon].

Bill Hemp
tech svc. w/ chemical supplier - Grand Rapids, Michigan
2002

(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: