May 2008. Completed  cleaning and passivation of  boiler tubes in TENT B for the Polish company RAFAKO. The tubes are stored outdoors and, inside the pipes, the corrosion was in a  significant progress, but there were  also the remains of   dehydrating means and fat. Cleansing treatment  was carried out combined mechanically and chemically and cleaned surfaces were passivated.

Before cleaning

After cleaning and passivation