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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Salt Spray Corrosion Protection of Magnesium AZ91D
One of my clients has a problem with achieving salt spray resistance with a nickel-plated AZ91D magnesium chassis for some electronic equipment. Clearly the 1.5V galvanic potential is promoting rapid corrosion at porosity in the coating. Can 100% integrity be achieved with a nickel electroplate or should they move to an anodised finish (masked in areas to allow earthing of the pcb). Maybe another option is electroplated Cd or Zn which is then passivated with a non-chrome finish?
Robin May- Melbourne, Victoria, Australia
2005
Electroless (autocatalytic) nickel may be a better option than electroplated nickel. I would investigate this option before trying electroplated zinc.
Toby PadfieldAutomotive module supplier - Michigan
2005
adv.
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