Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

copper blackening

Status
Not open for further replies.
Gerard-E

Gerard-E

Mechanical
Joined
Mar 2, 2021
Messages
9
Location
CA
Hi,

I am trying to blacken a copper strip (will probably come in reels, which also makes this more difficult). I know this can be done by a number of different methods, but I need something that can keep surface electrical conductivity after blackening. This seems much more difficult to achieve.

Has anyone heard of Ebenol C or Ebonol C? these products can apparently do this, but I cannot find anyone to do a coating test for us!! I have managed to get some spec sheets from different chemical companies, but they don't seem to be able to connect me with anyone that uses such products!!

Any and all help will be appreciated.
Thanks

G
 
Sort by date Sort by votes
You cannot have a coating or corrosion layer that will permit you to retain the full surface electrical conductivity of bare copper.
Copper will not anodize like aluminium will (at least as far as I know; perhaps Instagram hipsters have made a breakthrough there).
Haven't heard of Ebenol. Otherwise I don't know what to recommend, but I suspect a possible method might involve sulphur somehow.


"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
 
Upvote 0 Downvote
Liver of sulfur contains potassium sulfides so it's likely just corrosion the copper.
 
Upvote 0 Downvote
Yup... but the only thing I know of that turns it black.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik
 
Upvote 0 Downvote
MIL-F-495 FINISH, CHEMICAL, BLACK, FOR COPPER ALLOYS

I think You can also apply Phosphate treatments to copper alloys [paint base or standalone coating].


Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]
 
Upvote 0 Downvote
WKTaylor said:
MIL-F-495
Click to expand...

Phrasing.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
 
Upvote 0 Downvote
Ironic M… MIL-F-495... Phrasing???

Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

K8eng
  • Locked
  • Question Question
Copper Comparison C110 vs. C11000
Replies
8
Views
2K
Stephen Duquette
Stephen Duquette
rcx194
  • Locked
  • Question Question
Is copper tube and solder joints suitable in a high vibration environment such as inside an engine?
Replies
4
Views
724
EdStainless
EdStainless
MedicineEng
  • Locked
  • Question Question
Copper pipe annealing
Replies
9
Views
629
-
?
jerin james
  • Locked
  • Question Question
Copper Nickel plate (UNS 71500) - NACE MR 0175-
Replies
2
Views
399
TugboatEng
TugboatEng
irpheus
  • Locked
  • Question Question
Annealing Copper without oxidation - what is needed?
2
Replies
27
Views
2K
irpheus
irpheus

Part and Inventory Search

Sponsor

Back
Top