Specialty Chemistry Forums > Chemical Engineering Forum
Chrome plating
tms9918:
Many screws appear yellow, like this
They are known as chrome plated, but, if I am not wrong, chrome plating is for having a shiny, silver like color.
What do they add that makes them yellow?
I had some oxidized screws (the oxide was white). I stripped the oxide with acetic acid. This removed the plating as well, so I plated them with nickel. This clearly changed the color to gray. I would like to restore them to the original color, how can I do that?
And, is there something other than acetic acid that only dissolves the oxide and not the plating itself?
Enthalpy:
Chromated. This screw is anodized.
tms9918:
Sorry, I just posted a pic of a screw I found online to describe the color. I attach a pic of the actual screw. I would doubt they went so far at anodizing. It's a screw from a sega console, manufactured in 1982, and my guess would be they tried to choose the cheapest possible screws.
Borek:
https://en.wikipedia.org/wiki/Chromate_conversion_coating
tms9918:
Thank you, I believe it's exactly this!
It seems a pretty nasty chemical
https://labchem-wako.fujifilm.com/sds/W01W0116-0365JGHEEN.pdf
Is it this bad even at low concentrations?
Navigation
[0] Message Index
[#] Next page
Go to full version