jpg - Is there any method to deliberately digitally corrupt an image?

For an art project. I want to take a high-resolution digital image and digitally 'corrode' it.

My original intention was to subject an image to repeated jpg compression, and show the iterations, but after experimenting I realise that the compression method won't achieve any effect after the first pass (rookie mistake).

What methods are available to do this, if any? While I'd like to go for a progression, as in the compression example, I'm happy to hear about methods that would achieve random results as well (for instance imitative of digital static).