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 59003

Aluminum finishing options with good heat transfer



October 25, 2012

Q. I am working on a project that requires adding a finish coat to all but one side of an aluminum block. I was hoping that someone could make a suggestion about the best finishes to try that meet the requirements below.

The finish coat needs to handle continuous operating temperatures from -65 °C to 250 °C. The finish also needs to have good heat transfers characteristics (as close to aluminum as possible) along with a smooth finish.

The side that is not being finished has a coating with good resistance to hydrochloric and acetic acid but poor resistance to chromic, hydrofluoric, nitric, and sulphuric acid. This coating needs to be applied before the finish coat due to processing restrictions.

From what I have found on-line so far I am leaning towards electroless Ni plating but do not know if this is the best option.

Any help or advice is appreciated.

Thanks.

Blake Finstad
- Minneapolis, Minnesota


October 26, 2012

It would help if you told us why you need the coating on the aluminum block.

jim treglio portrait
Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover - San Diego, California


October 29, 2012

Q. The coating is mainly for cosmetics and in some cases light wear resistance. The aluminum block is a heat sink so that is why it needs to have good heat transfer properties.

Blake Finstad
- Minneapolis, Minnesota


First of two simultaneous responses -- November 1, 2012

A. Blake

Have you considered anodize? Mask the one surface from the process.

Willie Alexander
- Colorado Springs, Colorado


Second of two simultaneous responses -- November 1, 2012

A. For the best heat transfer (heat sinks) you need a smooth surface regardless of appearance. The greater the exposed surface area, the greater the transfer. Mass finishing can accomplish that task.

tony kenton
AF Kenton
Hatboro, Pennsylvania


November 5, 2012

Q. We did consider anodizing but were worried about the type of acids used in the process. The coating that is applied to the 1 side is porous so it is difficult to mask it effectively. There is a chance that the acids could wick into the coating from the edge.

Blake Finstad
- Minneapolis


November 8, 2012

A. I understand that electroplated bright nickel "fills", i.e., levels the surface. I don't know if aluminum can be electroplated, but maybe this would be solution??

jim treglio portrait
Jim Treglio - scwineryreview.com
PVD Consultant & Wine Lover - San Diego, California
none
finishing.com is made possible by ...
adv. 
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