Corrosion Passivation
Corrosion Passivation
(OP)
I have a machine that operates in a water environment. The two materials are aluminum and brass. The aluminum is anodized but is corroding (piting) due to large difference in the electronegativity scale and the resulting difference in the anode to cathode ratio. I am considering plating the brass with .0005" to .001" of cadmium. The result should be that the machine is passivated and the corrosion currents should be reduced to near zero. Am I on the right track. What about other plating options?
Thanks in advance,
Joe B
Thanks in advance,
Joe B





RE: Corrosion Passivation
RE: Corrosion Passivation
What type of water.
RE: Corrosion Passivation
RE: Corrosion Passivation
As “TVP” mentioned zinc is a potential plating tough I’ve found that cadmium platers tend to do a better job. Talk to the plater and anodizer about their capabilities and experience with the different systems.
Here is website posted on another thread that maybe of assistance.
http://anodizing.org/index.html
Also check out:
www.finishing.com
If you can post the type of water the component is exposed to, salt , fresh, etc.
RE: Corrosion Passivation
RE: Corrosion Passivation