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


Finishing.com has been free for 22 years,
but without net neutrality we could soon
cease to exist. Do us a solid, click on
the banner, and contact congress today!
HomeFAQsBooksHelpWantedAdvertiseForum
topic 8416

Copper Removal from Acid Etch


(2001)

Our processors recently etch the copper bars from our anodize tank to clean them instead of the normal scrubbing. This has caused a copper contamination problem and I am seeing some copper coming out on the parts that are acid etched, specifically the 7075 series alloys. Is there a filter or filtration unit that will remove this? Is there anyway of solving this problem without remaking the bath? This bath is less than one year old, with minimal a workload run through it.

Benjamin Curto
- Ponderay, Idaho, USA


(2001)

At first glance, this looks like a case for ion-exchange treatment. However, to my knowledge, acid etches are mixtures of different acids (some containing chromic acid) and this may complicate the problem. In my opinion, it is best to change the solution and never to do the same thing again.

Dado Macapagal
- Toronto, Ontario


(2001)

Hind site is always 20/20. But without sounding like a wise guy, removing copper from the anodizing line is an idea who's time has come. Aluminum will work as well and has less draw backs. Replace any copper around or near the anodizing line. Also turn in your lead if you use it. Once your with Aluminum you will not look back!

drew nosti
Drew Nosti, CEF
Anodize USA - Ladson, South Carolina


(2001)

I will back Drew up on that comment. We recently rebuilt our anodize tank (some 25 years + of use, it was due for a complete tear down and rebuild) well in the process of doing this we increased its depth. I also wanted to switch away from lead cathodes and copper buss bar at the same time, but my thoughts were shot down.

I guess its easy to say, but hard to convince the "old schoolers" in some cases that there ARE alternatives that DO work better than their old school techniques. In this case, its time tested and proven to be more reliable, and less troublesome than the above mentioned method of lead/copper around the anodize tank.

By all means, invest whatever small amount of money is necessary, the paybacks to you will be almost immediate, and the less headaches we all have to deal with, the better right?

Matthew Stiltner
plating shop - Toledo, Ohio



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 Q or A to THIS thread START a NEW THREADView This Week's HOT 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


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.