Perferred locally available cleaning solution for ultrasonic?

[Whitrzac]

I need to clean some corrosion off of some 7/8 valves... I have an ultrasonic cleaner. What's the recommended cleaning solution that I could get locally?
I saw 50/50 vinegar/water mentioned in a thread.

 

[greeniguana]

Vinegar works fine for corrosion.

Pretty much anything is "locally available" in this day and age. I use Alconox and BlueGold. Latter for O2 cleaning, former for non ultrasonic plastics.

 

[runsongas]

some prefer citric acid instead of vinegar. simple green crystal as an alternative to blue gold.

 

[Bigbella]

some prefer citric acid instead of vinegar. simple green crystal as an alternative to blue gold.

I've used citric acid for years, since it is highly effective; dissolves quickly; and is readily available, in the canning aisles of most large supermarkets, where it is typically used as a preservative, especially for tomatoes . . .

 

[Zung]

I use diluted dish washing liquid for this, and also for mopping the floor.
Vinegar is a bit agressive; I only use it against verdigris, if present, and in a separate bath.