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topic 0037

Albaloy, Miralloy, Optalloy copper/tin/zinc alloy plating


A discussion started in 1995 but continuing through 2019

1995

Q. I'm looking for information on a copper/tin/zinc alloy process marketed under a variety of names including Albaloy, Miralloy, Optalloy. I worked with the process some years ago and have contacted a couple of vendors for updated information, but it seems little has actually ever been published. I think the process dates to the 1940's.   what I am really after is real-world experience pertaining to this alloy. Bath makeup, maintenance, and life cycle would be appreciated. Also desired is information on deposit properties such as solderability, shelf-life, corrosion resistance, and electrical properties. Finally, are there any non-destructive thickness methods available (can you do XRF on the deposit)?   Thanks      

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



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.



2006

Q. Hello all, I worked in the Tektronix plating department from 1979 until 1990. We used a Cu-Sn-Zn bath patterned after H-VW-M's "Albaloy" solution. I would be interested in any data sheets, formulation, or really any info that any of you might have. Best regards, Marianne

marianne_mcpherson
Marianne McPherson
- Santa Barbara, California USA


2006

A. I was in the equipment division at M&T Chemicals/H-VW-M, so I don't have any data sheets for H-VW-M processes. But I do have a large collection of Metal Finishing and Plating magazines if you know of anything published about it.

One thread here says Albaloy is still available from Atotech. Another says Technic's TechniWhite is a successor to Albaloy. A third says a similar process called Miralloy is available from Degussa Galvanotechnik, marketed in the USA by Uyemura International Corp. And a fourth suggests Enwhite 100 system from Engelhard CLAL of Singapore and France.

Epner Technology in Brooklyn and Precision Plating in Chicago claim to do Albaloy plating and might be able to help with formulation, etc.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



Q. I need some information about Optalloy, that includes formulation and characteristics.

hassan karami
tarbiat modarres university - tehran, tehran, iran


Nickel and the Skin
from Abe Books

or

2007

A. There is renewed interest in this these days because of the need to eliminate nickel plating from jewelry. While some of those older trade names may still be in use, it is usually called "white bronze" plating these days. It is in wide use in many countries, perhaps less so in the USA because we do not have a ban on nickel in jewelry as many other countries do. I heard a good presentation about it recently by Uyemura.

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



April 12, 2011

Q. Help! I teach jewelry making in a public high school and the cost of sterling is becoming prohibitive. I am exploring "white bronze" (yes, I know it is not technically accurate) as a way to provide a white metal alternative to Sterling that does not cause skin and discoloration problems.

I realize that white bronze is know also as Miralloy and several other names, mainly related to plating processes. Is this metal available in sheet and wire?

I have 28 students currently enrolled in jewelry making, it is very frustrating that the costs of sterling are restricting them to pieces that can not be worn … we have been working mainly in copper.

Any help or suggestions are very appreciated! Regards, Mary

Mary Rogers
public school education - Houston, Texas, USA


April 14, 2011

A. Try nickel silver or monel metal, or even pewter. White bronze can be plated from cyanide and cyanide-free baths.

Imitation chrome plating can be good option too: 20 gms cobalt sulphate/10 gms zinc sulphate/50 gms citric acid/1 lit water-according to USA patent USPT 4,299,671.Hope it helps and good luck!

Goran Budija
- Zagreb, Croatia



October 2, 2015

Q. Hi,

I work for a jewelry company in the United Kingdom and we use White bronze as a coating to protect silver plated jewelry. We use X-ray Fluorescence to find out the microns of the plating, but we are struggling to get a reading for the white bronze. This could be a number of different factors, but what I wanted to know is can suppliers cut corners in the process to plate the white bronze/miralloy?

I have done some extensive research into Miralloy, Optaloy, Albaloy or white bronze (depending what people know is as) and I cannot quite figure out a way to see how our suppliers are producing it.

Any feedback would be grateful.

Grant Miller
- Oxfordshire, England


March 2019

A. Hi readers. This is a largely anonymous internet forum (no registration, and fictitious names sometimes slip through), so we must guard against accidentally assisting in crowd-sourcing of industrial espionage. We'll be pleased to post any offered links to patents or published info, but we can't directly post any formulation info unless offered by people well known to us.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"



February 25, 2016

Q. I have also been looking into using white bronze. My main purpose however is to use it for a diffusion barrier between copper and gold. Will a non-white bronze plating system act in the same way although it is not "white bronze"

Ryan Kuhns
- Denver, Colorado, Park



February 26, 2019

Q. Hello, could you send me analytical control for this process?
I work with this process, but I don't have information.

Karina Torres
- Lima, Peru


"Electrodeposition of Alloys: Principles & Practice"
by Abner Brenner
from Abe Books
or
info on Amazon
or
see our Review

March 2019

A. Hi Karina. If you are using Uyemura's Miralloy process you can request their technical data sheet from their website. If you register at IEEE Global spec you can supposedly download Technic's Techniwhite data sheet for free (but I didn't register so I can't vouch). A few minutes of googling did not reveal any other current sources for technical data sheets for white bronze plating.

Surfacequery.com lists a number of articles on the subject, including some that perhaps address metal content of the deposit, but probably not analytical control. Brenner has 6 pages on copper-tin-zinc alloys =>
Good luck!

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"



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