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4 comments
Active Contributor

Join Date: Jul 2008
Posts: 17

coloring black

07/25/2008 7:14 AM

we do black color in plating but find that some part in some area not all over , turn reddish or reddish brown .can anybody send us the reason .

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Commentator

Join Date: Feb 2008
Location: Van Nuys, CA
Posts: 97
Good Answers: 4
#1

Re: coloring black

07/25/2008 8:00 AM

What is the base material? What plating process?

Active Contributor

Join Date: Jul 2008
Posts: 17
#3
In reply to #1

Re: coloring black

07/26/2008 7:45 AM

base material is c55 ie %of carbon is .50-.55% and the mangnese is .70-.90%

its a medium carbon steel. and we make assembly of cast and forge steel(same composition).color on the forge steel is black and cast steel is somewhere black somewhere reddish.

Commentator

Join Date: Feb 2008
Location: Van Nuys, CA
Posts: 97
Good Answers: 4
#4
In reply to #3

Re: coloring black

07/26/2008 11:05 AM

Again, what process are you using to plate or color the metal?

Guru
Engineering Fields - Engineering Physics - New Member

Join Date: Jul 2007
Location: Pittsburgh
Posts: 1626
Good Answers: 50
#2

Re: coloring black

07/25/2008 8:14 AM

Are you anodizing by chance?

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