yxtechco Passivation #brass#passivation Metal surface passivation treatment is a common method of metal surface treatment, which aims to change the chemical properties of the metal surface to form a protective layer with good corrosion resistance and wear... morePassivation #brass#passivation Metal surface passivation treatment is a common method of metal surface treatment, which aims to change the chemical properties of the metal surface to form a protective layer with good corrosion resistance and wear resistance, thereby improving the corrosion resistance and service life of metal materials. https://www.yxtechco.com/metal-passivation.htmlless