Does copper oxidize? How to treat oxidized copper

          All copper or copper alloys will rust in the natural environment, but the degree is different, among which oxygen-free copper rusts more slowly, followed by most bronze and ordinary industrial pure copper  (industrial copper) brass is more prone to rust, especially H59 is the most easy to rust, which is determined by the characteristics of its chemical composition  

          The treatment methods of brass handle rust mainly include physical grinding, chemical cleaning and passivation.   

          1. Physical grinding: Use sandpaper and other tools to polish the rusty parts to remove rust marks. However, this method can easily cause scratches on the furniture handle design surface, especially for delicate decorative strips, which may outweigh the losses   

          2. Chemical Cleaning: Rust can be removed quickly with strong acidic or alkaline cleaners, but these cleaners are corrosive to brass handle and can cause tarnishing or even permanent damage to the surface. 

          3. Passivation treatment is a commonly used method of rust removal and use KEMON brass is chrome-free passivationliquid. The soaking process is carried out, and the soaking time is about 5 to 10 minutes. This treatment forms a chemical film on the surface of brass handle, which effectively blocks oxygen and moisture in the air and prevents the formation of rust.