I use bleach bath on large pieces of driftwood and never had any troubles with it. I just rinse it with burning hot water and let it sit overnight in hot water with dechlorinator and a pump with air.
Although it looks kinda white-ish for a couple of days afterwards from the chlorine residuals I guess.
I have also done it with Pp bath strong violet solution. And also nothing wrong, except this time wood ends up s bit yellowish and kinda rusted just for a couple of days.