METHOD FOR THE SURFACE TREATMENT OF CORTEN STEEL

摘要

The present invention relates to a method for the surface treatment of Corten steel, in particular comprising the steps of cleaning, activating, coloring, and sealing the surface. The invention further relates to Corten steels produced by the method according to the invention.

主权项

1. A method for the surface treatment of Corten steel, comprising the following steps:
(i) providing Corten steel and carrying out a treatment comprising the following stages: (1) cleaning at least a portion of at least one surface of the Corten steel, thereby forming a cleaned surface; (2) activating at least a portion of the cleaned surface of the Corten steel from stage (1) by bringing the cleaned surface into contact with an aqueous activating solution containing fluoride ions, one or more oxidizing agents, and optionally one or more stabilizers for the oxidizing agent(s), thereby forming an activated surface; and (3) coloring at least a portion of the activated surface of the Corten steel from stage (2) by treating the activated surface with water for a period of at least 30 minutes and until the desired coloration of the surface of the Corten steel is achieved, thereby forming a colored surface; and (ii) sealing at least a portion of the colored surface from stage (3) of step (i) by applying a colorless, transparent coating, thereby forming a surface-treated Corten steel.