Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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CHROME OR RHODIUM PLATING ALUMINUM
WE WANT TO PLATE AN ALUMINUM PRODUCT USED IN THE MARINE INDUSTRY . WE WANT IT TO BE PROTECTED AS GOOD AS POSSIBLE .WITH A COST FACTOR, WHAT IS THE BEST WAY TO PLATE ALUMINUM TO LAST IN THE ELEMENTS, OF SALT WATER.
ROB MCKAY- VAN, B.C., CANADA
2006
Hi Bob,
It would be much more expensive to plate Rh, especially with the thickness required for salt water applications. The Rh deposit would be too stressful. I have seen good results with a microcracked hard chrome (bright), with a sulphamate Ni underplate. Good Luck!
Process Engineer - Syracuse, New York
2006
Forget Rhodium. It cracks and then the seawater will undercut the deposit and lift it right off. In seawater, nothing beats Cadmium. I heard that Zinc-Nickel alloy was supposed to replace Cad, but I don't know how far that's gotten.
Dave Kinghorn
Chemical Engineer
SUNNYvale, California
2006
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