I did a brew and chucked a load of bits and bobs into a large pan of oxi cleaner (from Lidl) whilst I cleaned other stuff. There was plastic, stainless steel, brass and copper in there with a couple of taps. Once I got a minute a few hours later, I discovered my taps appear to have rusted...

Firstly, is this rust or some other reaction? Why did it happen so quickly? And also do you think its enough to just rinse all the other things that were in the pan with the taps?