Ultrasonic Cleaning Times

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Grimbot

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I have a MK10 piston that has some corrosion at the base. I put it in the US with 1:30 SGC then 1:1 vinegar solution both for about 3 minutes. It came out pretty clean some corrosion remains. I'd like to hear from anyone if longer US times in 50/50 vinegar are harmful to a piston. How long is too long? I have a Crest US if that matters. Thanks.

upload_2021-2-15_17-6-47.jpeg
 
the US definitely matters as the more powerful it is, the less time it needs. I would soak it in boiling water for a while then try it in the ultrasonic again. If it doesn't, then you may just have to deal with it or you'll risk taking the chrome off with the vinegar
 
I have a MK10 piston that has some corrosion at the base. I put it in the US with 1:30 SGC then 1:1 vinegar solution both for about 3 minutes. It came out pretty clean some corrosion remains. I'd like to hear from anyone if longer US times in 50/50 vinegar are harmful to a piston. How long is too long? I have a Crest US if that matters. Thanks.

View attachment 642390
You can probably go another 3 minutes once or twice with minimal risk. My cheap US cleaner is not very powerful but I’ve had stubborn parts in there for two 8-minutes cycles in 50/50 vinegar solution in addition to a few cycles in Simple Green solution without any chrome damage. Give the corroded areas a good scrub with a stiff nylon brush (I bought a denture brush for this and it works great) or Scotch pad after a hot water soak to limit the time needed in US cleaner.
 
I didn’t really think about it but is the piston chromed or just Stainless steel. I assumed it was SS.
 
Some parts seems superficial as i scraped bits off but a few spots seem pitted. Its not a big deal. Just looking for additional guidance on how long I can zap the piston without damaging it.
 
Some parts seems superficial as i scraped bits off but a few spots seem pitted. Its not a big deal. Just looking for additional guidance on how long I can zap the piston without damaging it.
I don’t know for sure but I suspect you’ll get tired of running it in the US long before you can damage it.
 
Here is some rust

full.jpg


You do the piston and spring mechanically and with a stainless brush in a rotary tool
 
https://www.shearwater.com/products/swift/

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