Sorry, that is nonsense. You are over-interpreting a term. Put a plastic bag into the sun for some months and it will break into tiny pieces on the slightest touch. The radiation outside the earth atmosphere is way more dissolving than the sun shine on the ground. So a material could be chosen so that it desintegrates, if you don't like the term "dissolve", in a certain timespan in space. Actually, it will be a challenge to make sure that those disks hold up long enough.

Sorry, I thought we were having a science based discussion where words have meanings...

We're talking about retrieval difficulty in a worst case scenario. Even if it disintegrates, you've left a cloud of particulate matter that's going to create even more unintended consequences and is more difficult to collect / move / mitigate.

I think it was plenty clear what I was trying to say. I am not a native English speaker, but in German, the term "auflösen" literally means to dissolve in a solution, yet, no one would have misunderstood it in the context of space. For most people it is quite obvious, there is no solvant in space.

So if you feel the need to correct my use language, please do it in a constructive manner.

Do you know what happened to USA flags which astronauts installed on the Moon?

I don't- but if it "disappeared" it would likely be disintegration and dispersal, or possibly sublimation.

But it certainly didn't dissolve.