Pickling: Pickling is a method of removing oxide scale, welding slag, rust spots and other impurities on the surface of stainless steel by using an acidic solution (usually sulfuric acid or hydrochloric acid). This helps improve the corrosion resistance of stainless steel.
Polishing: Polishing is the polishing of the surface of stainless steel through mechanical or chemical methods to obtain a smooth and bright surface. Polishing not only improves the appearance, but also helps remove minor surface imperfections.
Sandblasting: Sandblasting uses high-speed jets of sand or other particles to scour the surface of stainless steel to remove scale, dirt and provide a uniform surface texture.
Coating: For special requirements, a thin film can be coated on the surface of stainless steel, such as oxide film, chromium plating, nitride, etc., to increase the hardness, wear resistance and corrosion resistance of stainless steel.
Electrochemical polishing: This is a process in which an electric current is passed through an electrolyte to reduce the oxides on the stainless steel surface to metal, thereby obtaining a bright surface. This method is common for some applications requiring high gloss.
Anodizing: Although usually associated with aluminum, in some cases stainless steel can also be anodized to form a protective oxide layer that improves its corrosion resistance.
Coloring: The surface of stainless steel can be colored by chemical treatment or electrochemical treatment to obtain a specific appearance. This can include a variety of colors and patterns.
Heat treatment: Heat treatment can change the crystal structure and hardness of stainless steel, thereby affecting its mechanical properties and corrosion resistance.
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