METHOD FOR PATINATING ZINC SURFACES AND SYSTEM THEREFOR

摘要

The invention relates to a method for patinating zinc surfaces of a structural element, comprising the steps of: - providing a structural element with a zinc surface in a housing; - providing an atmosphere around the zinc surface, wherein said atmosphere comprises carbon based gas and humidity; and - heating the zinc surface for at least one hour, to provide a patinated zinc surface, wherein the heating of the zinc surface occurs by heating the atmosphere to a temperature of at least 50 °C, the humidity is at least 70%, and the carbon based gas concentration is at least 5% by volume. The invention also relates to a patinated evaporative condenser in a closed circuit cooling tower, wherein the patinated evaporative condenser in a closed circuit cooling tower is by the method according to the invention. The invention also relates to a system for patinating zinc surfaces according to the invention.