Abstract: An exhaust system for an industrial washer is proposed. The exhaust system comprises a conduit that can be coupled to an exhaust air outlet of a washer. A condenser is coupled to the conduit and configured to cool and to extract humidity from the exhaust air. A filter housing with removable filter is connected to the condenser and configured to filter said exhaust air. A fan with an exhaust outlet is connected to the filter housing. A controller is configured to control at least the fan to extract the exhaust air from the washer outlet through the conduit, condenser and filter housing and to eject dried and cooled exhaust air from said exhaust outlet. By reducing the humidity and temperature of the exhaust air, the condenser improves the efficacy and lifetime of the filter. The effective and reliable removal of contamination is thus ensured while the need to further process the waste air is obviated.

Abstract: This invention relates to a corrosion inhibitor for protecting metallic surfaces which are in contact with water, in particular circuits, apparatus and devices which use water as energetic or thermic fluid, said corrosion inhibitor being a fluorophosphate compound selected from the group consisting of:(i) compound of the formula M.sub.2.sup.I PO.sub.3 F, xH.sub.2 O(ii) compound of the formula LiM.sup.I PO.sub.3 F, xH.sub.2 O(iii) compound of the formula NaM.sup.I PO.sub.3 F, xH.sub.2 O(iv) compound of the formula M.sup.II PO.sub.3 F, xH.sub.2 O(v) compound of the formula M.sub.2.sup.I M.sup.II (PO.sub.3 F).sub.2, xH.sub.2 O(vi) compound of the formula M.sup.I PO.sub.2 F.sub.2, xH.sub.2 O(vii) compound of the formula M.sup.II (PO.sub.2 F.sub.2).sub.2, x H.sub.2 O(wherein M.sup.I is Na, K, Rb, Cs or HN.sub.4 ; M.sup.II is Mg, Ca, Ba, Sr, Zn, Cd, Mn, Ni or Co; and x is an integer or a fractional number comprised between 0 and 6) and(viii) mixtures thereof.