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 9468

Does humidity affect rhodium?


(2001)

We are manufacturer of 18K diamond studded gold jewelry. Most of our jewelry contains colored diamonds.

Since a month back, we used to give our jewelry in the market for rhodium. Now we have installed a plant. I am facing a problem with pink rhodium. It was initially coming fine; but right now, in monsoon, its giving a blackish-tint.

Does humidity affects rhodium? If yes, how do I rectify it?

Could you also provide me assistance regarding the temp and voltage I shall keep for different (white, royal gold, black and pink) rhodium?

Sudeep Sethi
- Indore, M.P., India


(2001)

It is very unlikely that humidity or the monsoon has any effect on your rhodium plating bath unless you have a leak and rain water is dripping into your bath. Rhodium plating baths have a very low tolerance for contamination so all water added must be DI water. The parts also must be free of any residual polishing compound and then cleaned and activated properly before going into the plating bath. Ordinary rhodium operates at between 2 and 10 A/dm2 and between 40 and 50 degrees C. I have never heard of pink or royal gold colors from a rhodium bath but I assume they are alloy baths like black rhodium so the current density and operating conditions should be available from your supplier.

Why are you using a rhodium bath for gold color when real gold is only about 1/6 the price of rhodium?

Neil Bell
Red Sky Plating

supporting advertiser
Albuquerque, New Mexico
red sky banner ad


(2002)

For your information, What is referred to as Pink Rhodium is really pink gold. There is no such thing as pink Rhodium. When you apply pink gold you have to be on a lower voltage and apply it for a longer amount of time or else it will burn

Sam Obermeister
- Brooklyn, New York


September 8, 2011

Hi
There is a Brown/Pink Rhodium, I think Heraeus use to make; but this is for pen plating. Well, humidity can affect plating.
It will affect the working of rectifiers first, then on the connections that are part of plating process equipment.

Ravi Chandavarkar Ravi Chandavarkar
plating shop employee - Mumbai, India



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.