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

Chime right in! (no registration req'd)

-----

"Gold or Other Metal Plating on Aluminum for Chemical Resistance to Mild Aqueous Conditions"



February 2, 2010

I am looking for advice on a coating for scientific equipment that will be machined from aluminum. The machined part will have wells that will contain aqueous solutions of proteins, buffers (4<pH<11), salts. While for the most part innocuous, I want to avoid direct contact with Aluminum surface and thought gold would be the best plating. Added advantage of gold is that the entire device will be immersed in a water bath to maintain a very constant (± 0.005 C at 20 C) temperature, and gold is an excellent heat conductor. However, I am finding that gold is somewhat porous and have no idea if this will have an effect on the experiments. How difficult is it to plate small pieces of aluminum (13" x 3" X 1/2") with gold (can it be done well with electroplating "kits"?) and are there good alternatives to gold that are chemically resistant and non-porous?

The purpose of the inquiry is to see if I can make an isopiestic apparatus from a single bar of metal; isopiestic devices date back to 1918 when Bousefield introduced the idea of balancing the vapor pressure of water over different aqueous solutions.

George DeTitta
scientist - Buffalo, NY
^


February 2, 2010

Hi, George. Gold plating might be ideal. Find a plating shop that does gold plating and has experience in electroplating of aluminum, and I'm sure they can do exactly what you need. Good luck.

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
^

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