The surface micro-pit array plays a huge role in mechanical sealing

friction and wear

surface lubrication

heat transfer and heat dissipation. To be able to jet electrochemical machining micro-pit array on GH4169 nickel-based superalloy

the polarization curves of the alloy in different electrolytes were tested and the electrolyte was optimized. Then

the influence of processing voltage and jet velocity on the micro-pits by jet electrochemical machining was explored

 and the micro-pit array was processed by optimizing the process parameters. Finally

using mass fraction 10% NaNO

3

as the electrolyte

processing voltage of 25 V

and jet velocity of 10 m/s

the micro-pit array with high precision and good consistency is fabricated. The aspect ratio is 0.376 and the standard deviation of the asp

ect ratio is 0.004372 for the micropit array.