finishing.com -- The Home Page of the Finishing Industry

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
The world's most popular metal finishing site, and striving to be the internet's friendliest corner

topic 15927

Strip Nickel Chrome from Plating Racks


A discussion started in 2000 but continuing through 2019

2000

Q. We are a zinc die caster/Plater (same facility), and use nitric acid to strip our built-up plating racks. The spent nitric is being sent off site. I have read an article that suggests using an "Ultrafilter"loop to remove the heavy metals, and prolong the life of the nitric, or can reduce it's composition of heavy metals; than it can be disposed of in a more effective method. This makes sense since it is the heavy metals that are causing the classification that makes the nitric such a problem.

First question, is anyone using this technique, and if not, does it make sense?

Joseph DeAmicis
Academy - Edison,New Jersey


2000

A. Joseph,

You did not mention what type of plating you are doing but, since you are using Nitric Acid to strip your racks I am assuming you are doing Nickel- Chrome plating.

Diffusion Dialysis systems has been effective in recovering nitric acid from these processes. You are correct in stating that the resulting waste stream is more easily waste treated.

Tony D'Amato
- Chicopee, Massachusetts

----
Ed. note: Readers may be interested in thread 2579, "Waste Treat Nitric Acid Nickel Strip"



2002

Q. Dear Sirs:

I need to strip nickel-chromium layers of 316 stainless steel contact tips of plastisol coated racks. I would appreciate a formulation for immersion an electrolytic stripping. Thanks in advance.

Oscar Infante
- Santiago, Chile


simultaneous 2002

A. Hello ! Oscar Infante,

You want to strip chrome and nickel on stainless steel.

I think you have to the follow two steps.
1. First you have to strip chrome by using hydrochloric acid or reverse current in electrocleaner tank ( cleaner concentration 6-10 % by volume,Temperature 140F ).
2. After completely strip the chrome then strip the parts in nitric acid."DO NOT LEAVE THE PARTS TOO LONG TIME IN NITRIC ACID".

popat patel
Popat Patel
    Beacon Park Finishing LLC - Roseville, Michigan


2002

A. For immersion stripping nitric acid at 50 - 75% by vol will dissolve the nickel and under cut the chrome. Electrolytic strippers are based on ammonium nitrate with buffers and activators and available as proprietary processes.

Geoffrey Whitelaw
Geoffrey Whitelaw
- Port Melbourne, Australia



To minimize your searching efforts and to offer multiple viewpoints, we've combined some threads into the dialog you're viewing. Please forgive any resultant repetition or failures of chronological order.



Plating rack stripper

2002

Q. Can anyone give me a good way to strip old silver and nickel plating from my plating racks. Racks are stainless steel.

Jerry Hannibal
- Beverly, Massachusetts


2002

A. Nitric acid (50-70% by volume) will do this job. Good fume extraction is essential.

Geoffrey Whitelaw
Geoffrey Whitelaw
- Port Melbourne, Australia



September 21, 2019 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. We are having nickel chrome plating process. I would like to know is there any way chemically to remove the plating deposits on open contact parts of jig fixtures?

Sandip Sanagar
- Nashik, Maharashtra, India

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

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


©1995-2019 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.