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-Passivation: Primarily applied to stainless steel to create a protective oxide layer and enhance corrosion resistance.
-Anodizing: Mainly used on aluminum and other anodizable metals to increase surface hardness, wear resistance, and provide color options.
-Passivation: Primarily a chemical treatment used on metals to enhance corrosion resistance.
-Sandblasting: A mechanical surface treatment method that alters surface structure, cleans, and increases roughness by high-speed jetting of sand grains or other abrasives.
Passivation aims to create a dense, uniform oxide layer that prevents further oxidation reactions on the metal surface, providing a protective barrier. This is crucial for applications requiring high corrosion resistance such as food processing, medical devices, and chemical industrial equipment.
Passivation mainly focuses on improving the corrosion resistance of metals and is typically applied to stainless steel; whereas other surface treatment methods may have broader applications including aesthetic enhancement, hardness improvement, conductivity enhancement, etc.
The main purpose of passivation is to enhance the corrosion resistance of metals like stainless steel, extending lifespan and improving their performance under various environmental conditions. It’s commonly used in applications requiring high corrosion resistance such as food processing, medical devices, and chemical equipment.
-Cleaning: The surface must be thoroughly cleaned to remove any dirt, grease, or other impurities that may affect the treatment.
-Pickling: The metal surface is then treated under slightly acidic conditions, which helps to remove oxides and other impurities, while creating a better substrate for the next step.
-Passivation treatment: Typically done by immersion or spraying, specific chemical agents are used to react with the metal surface, forming a protective oxide layer. This helps prevent further oxidation, corrosion, or other surface damage.
-Neutralization and rinsing: Objects after treatment often need to be neutralized and rinsed to remove residual treatment agents, ensuring the surface is clean.
-Drying: Finally, the part need to be completely dried.
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