Cleaning blackened and iron crusted gold

LongJohnSilver1 said:

. . . I often find old gold in the ocean . . .

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ChrisMD said:

You could do it with an industrial ultrasonic, something beefy with industrial transducers and a sweep and degas function. They used to start around $1k, but now there are Chinese offerings that start a little over a hundred, though unsure how long they'll last. I have one that I used to use for my data recovery side hustle cleaning up corroded phones to pull photos. They are ridiculous though, you have to be very careful on timing and not leaving them go too long. For example, if I took a copper penny and dropped it in, a couple minutes too long and it would chew the details right off, so always have to make sure to use the timer and in increments.

SRA Trupower is probably king of the budget industrial ultrasonics, but even the smallest 2L is $175. https://www.sra-solder.com/ultrasonic-cleaners/standard-ultrasonic-cleaners

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Digger Boy said:

Golly gee Wally, I sure wish I had your problem!
The Beave

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