Star patterns in milled parts

[shaunszili]

I am having issues with seeing star/cross patterns in milled parts after they have been buffed/polished and ran through the ultrasonic tank. It happens on parts that are both milled in house or purchased from a vendor. They only show up when the pieces are in the ultra sonic with it vibrating. If it is just the heat and chemical they are fine. Does anyone know why this may be happening or how I can stop it from happening. I have a lot of milled parts that I nickel plate and need to be able to run them through the ultra sonic first but am currently not able to. Thanks

[Skipjack]

Can you post a picture?

[shaunszili]

Not currently. I will have to wait until I run some more pieces. It almost looks like etching in the metal. I will see if I can find some pieces to run and get the reaction but we only cut parts for client orders so I'll probably have to wait until one comes through. I will post as soon as possible. Thanks for the response

[Caswellplating_Jason]

What type of solution is in the ultra sonic cleaner tank ?

[Caswellplating_Jason]

aluminum ? or something else ?

[shaunszili]

We use Omegaclean currently