How to solve the surface oxidation problem of stainless steel hardware turning copper parts? (Communities - Activities)
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How to solve the surface oxidation problem of stainless steel hardware turning copper parts? | |
1. Surface cleaning and pretreatment When solving the problem of surface oxidation of stainless steel hardware turning copper parts, surface cleaning and pretreatment are the key first steps. After turning, impurities such as oil, cutting fluid and metal debris may remain on the surface of the copper parts, which will accelerate the oxidation process. First, a suitable cleaning agent, such as an organic solvent or a special metal cleaning agent, should be used to thoroughly remove the oil and dirt on the surface. For the residual metal debris, ultrasonic cleaning and other methods can be used to ensure the surface is clean. In terms of pretreatment, copper parts can be passivated. Passivation is to form a dense protective film on the surface of copper parts by chemical methods to prevent oxygen from contacting copper atoms. For example, using chromate solution for passivation treatment, chromate can react with the copper surface to form a passivation film containing chromium, which can effectively isolate the air and slow down the oxidation rate. Moreover, during the pretreatment process, the copper parts can also be polished to reduce the surface roughness and reduce the possibility of oxidation, because the rough surface is more likely to absorb oxygen and moisture. 2. Applying protective coating Applying protective coating is an effective way to prevent oxidation of copper parts. There are many coating materials to choose from, such as paint, varnish and various organic coatings. Paint coating can provide a good physical barrier to prevent oxygen and moisture from reaching the surface of copper parts. When choosing paint, its weather resistance and corrosion resistance should be considered. For example, acrylic paint has good weather resistance and chemical stability and is suitable for copper parts. In addition to organic coatings, metal coatings can also be used. For example, a layer of nickel or chromium is plated on the surface of copper parts by electroplating. The chemical properties of nickel and chromium are relatively stable and can form a strong protective film to prevent copper oxidation. The electroplating process requires control of process parameters such as current density, electroplating time and electrolyte composition to ensure the quality and uniformity of the coating. Moreover, this metal coating can also enhance the wear resistance and aesthetics of copper parts. 3. Control the storage environment The storage environment has an important influence on the oxidation of stainless steel hardware turning copper parts. Copper parts should be stored in a dry and well-ventilated environment. Humidity is one of the key factors that lead to the oxidation of copper parts. When the ambient humidity is high, a water film is easily formed on the surface of copper parts, which accelerates the oxidation reaction. Dehumidification equipment can be used to control the humidity of the storage environment at a low level. Generally speaking, it is more appropriate to keep the relative humidity at 40%-60%. At the same time, avoid contact between copper parts and corrosive gases, such as sulfur dioxide and hydrogen sulfide. These gases will react chemically with copper in the presence of moisture, resulting in severe oxidation. If it cannot be avoided, desiccants and gas adsorbents can be placed in the storage container to reduce the impact of corrosive gases. In addition, copper parts can be packaged separately and use moisture-proof and airtight packaging materials, such as plastic film or aluminum foil bags, to further isolate air and moisture. 4. Add antioxidants In some cases, antioxidants can be added to the surface of copper parts to inhibit oxidation. Antioxidants can be attached to the surface of copper parts by physical adsorption or chemical adsorption to prevent the oxidation reaction from proceeding. For example, benzotriazole (BTA) is a commonly used copper antioxidant. It can form a stable complex with the copper surface, which can prevent the transfer of electrons between oxygen and copper atoms, thereby slowing down the oxidation rate. When using antioxidants, you can soak the copper parts in a solution containing antioxidants to allow the antioxidants to fully adsorb on the surface. Or mix the antioxidants with lubricants and apply them during or after the copper processing. This will form a protective film on the surface of the copper parts, and it can also play a role in lubricating and protecting the tool. However, pay attention to the dosage and validity period of the antioxidants. Excessive antioxidants may affect other properties of copper parts, and the effect of antioxidants may weaken over time, and they need to be replenished in time. | |
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| Target State: All States Target City : All Cities Last Update : 06 November 2024 3:19 PM Number of Views: 14 | Item Owner : fang Contact Email: Contact Phone: (None) |
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2024-11-21 (0.434 sec)