-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

on this site
current topics
topic 4339

Chrome In Cleaners


Hi Can we add Sodium Hydrosulfite in our electro cleaners to reduce hexavalent chrome. Currently we are at 2000 ppm of Chrome in cleaners.

If so, then what would be the by products and would they affect the cleaning process or the life index of the bath.

Also what else can we do to reduce any chrome in cleaners. Thanks

Hemant Kumar
Hemant Kumar
- Florida, USA


Hi Hermant.

You can use dextrose to reduce the hexavalent chrome to trivalent chrome.


Anders S

anders sundman
Anders Sundman
3rd Generation in Plating
Consultant - Arvika, Sweden



We use sodium hydrosulfite all the time in our cleaners without any residual effects. The by products I'm not sure, but to reduce if you have coated racks that are cracked or have holes they should be fixed they hold a lot of solution. Unfortunately it is usually the solution that causes problems.


Ken Hutchinson
- Minneapolis, Minnesota, USA


Steve Rudy in his Finishers Think Tank column in the February, 2000 issue of Plating and Surface Finishing gives a nice recap on the handling of hexavalent chromium in an electrocleaner (page 47).

Ken Lemke
Ken Lemke
Burlington, Ontario, Canada


Thanks Mr. Lemke.

you already gave me some good piece of advice on this topic during our meeting at the AESF/CAMF branch gathering.

I will try to get that paper which you indicated here.


hemant bansal

Hemant Kumar
- Florida, USA

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.