rebar

Thanks guys. Darn.. I guess rust isn't the protective patina like I was hoping. We have a great chemical treatment program and Iv never seen any pin hole problems unless we empty a system. Or have seen any rust out failures before the useful life of the unit was over. We nursed a few chillers from the seventies until just recently. And the last time we started removing rust, my boss handed us the nastiest paint know to man. yay, crap

Hello new around here.. I work at a chiller plant where we have over 30000 tons of cooling capacity for the university. My boss wants to remove the rust from the inside of our steel evaporator shells which I feel is just busy work. And may also speed up further corrosion. Does steel rust faster when its clean? Or does a layer of rust already formed, slow down further corrosion compared to raw steel? Thanks!