Hi,
we have installed last year ice bank tank, with direct evaporation within copper tubes.
Everything was fine for months, and than customer had stopped production for a month.
When they restarted the ice bank plant, suddenly they saw that bubbles and oil was coming out of the water, and realized that upper few raws are full of small holes (suroudend by green matter - probably corrosion?).

We have installed cca 20 ice banks like that, and never had any problems.

Anyone has an idea what might happaned or have similar expirience?

Rio