Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

World's #1 finishing resource since 1989
No login needed: Chime right in

topic 1937

Cleaning C2700 Brass in Preparation for Zinc Plating



1998

We are having problems cleaning brass inserts made out of C2700 Brass. The parts are heat treated (annealed). We are attempting to zinc or cadmium barrel plate these inserts. We have black spots left on the I.D. of the parts and this results in poor adhesion of the plating. Can anyone help us in the precleaning of these parts well enough to plate them. Nasty bright dips are not an option

Andy Scheer
plating service - Pacoima. CA


1998

Sure sounds like a cleaning or activating problem --

James Watts
- Navarre, Florida


1998

Try a chelating cleaner (if your waste treatment system can handle it).

All our rinses are recycled through ion exchange and carbon so the chelator is no problem. Concentrated wastes are drummed for off-site disposal.

We use a product from Technic called 1508L. It's liquid, contains only a wetter and the chelator. You can run a wide range of concentrations and temperatures to fit your application. For brass, we go directly to the plating tank after clean and rinse, no acid dip is necessary. I'm sure other suppliers have similar products.

bill vins
Bill Vins
microwave & cable assemblies - Mesa (what a place-a), Arizona 


1998

Sir, Can anyone suggest the proper solution for cleaning and de-oxidizing beryllium. The metal in question is the head of a set of golf clubs but have a plastic insert on the back. Whatever is suggested, the cleaning dip cannot be toxic or extremely corrosive. Thank you

McGurran A J
- London, Ontario, Canada


1998

As an alternative to stoddard solvents, I like the Actrel series of high purity hydrocarbons made by Exxon and distributed by Safety-Kleen. These are very pure, have extremely low odor, function essentially the same, and are available with varying flash points. Other manufacturers offer similar solvents (Phillips and Texaco I believe). A family member also uses the higher flash Actrel in his automobile repair shop's open top parts washer; it is nice to be able to wash parts and not have any of the residual odor.

Tom

Tom Hand
DOE - KC, Missouri


1999

Did you consider to polish in a machine called "rotofinish". The inserts would spin around in a tub filled with water, ceramic abrasive little stones (all kinds of shapes)and some soap if necessary. Otherwise you can test out some acid in water to dip in.

Johny Riskin
RISKIN - Belgium


1999

Can anyone advise me regarding the following... We manufacture brass components and presently have a need of adding an acid bath to our manufacturing process. We use the following brass classification C37700. What is the best chemical composition to use for an acid bath that will assure us that the component will meet NSF Standard 61. Any help would be appreciated. I would also appreciate the name or names of the suppliers of the above.

Frank D
- Ft. Lauderdale, Florida

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA