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topic 12329

Salt Spray Life with Hard Finish at Least Cost


 

I require for Radiator Fan motor shaft a salt spray life of 144 hrs (min) but at the same time, the design of the motor calls for heat treatment of the shaft. PL suggest a plating that can be done on a heat treated steel shaft and is hard enough for fitting a ball bearing on the plated surface. The proposition should be least expensive.

Ranjeet Malewar
GM of India - Halol, Gujarat


 

This sounds like a good electroless nickel application. But don't dismiss salt bath nitriding without investigating it.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey


 

EN is the way to go, and or Zinc iron or zinc nickel would also do as well. Ensure a final centerless grind over the shaft after heat treatment to minimise or eliminate the need for strong pickling during whatever plating finish you choose.

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind supporting advertiser
Bangalore, Karnataka, India

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