"white rust" prevention in cooling towers

“white rust” formation is probably the main problem in cooling towers made with sections in galvanized steel; “white rust” is porous and generally does not protect the steel structure. More importantly, corrosion of the underlying steel can become concentrated under the white rust bumps, quickly developing into pitting corrosion. Left unchecked, leaks can form in a tower basin in as little as two months in severe cases.

Acquaflex, in collaboration with some of major European cooling towers manufactures, developed a series of chemicals that permit to prevent galvanized steel corrosion in recirculated cooling systems; Polyflex 130 is the most advanced chemical for “white rust” prevention: it’s guarantee fast passivation and the integrity of zinc layer also in cooling towers systems where circulating water has high value of pH and alkalinity and low value of total and calcium hardness