How to prevent corrosion of intermediate joint metal connectors during long-term use?
Publish Time: 2025-02-07
In the long-term use process, the methods to prevent corrosion of intermediate joint metal connectors mainly include the following aspects:1. Select corrosion-resistant materialsUse corrosion-resistant alloys: In the process of manufacturing metal connectors, you can choose to add corrosion-resistant materials that are not easy to react with the surrounding medium, such as chromium, nickel, titanium, etc. These materials are not easy to oxidize in the air, can form a dense oxide film, and resist corrosion by acids, alkalis, salts, etc.Metal powder metallurgy: Using metal powder metallurgy technology, various metal elements can be flexibly proportioned, and metal connectors with excellent corrosion resistance can be obtained by adding metal powders with different properties.2. Surface treatment technologyCoating and spraying: Coating organic and inorganic compounds on the surface of metal connectors. Common methods include painting and plastic coating. Spraying uses a spray gun or a disc atomizer to disperse the paint into uniform and fine droplets and apply it to the metal surface.Metal plating: A layer of metal or alloy with anti-corrosion properties, such as zinc, tin, aluminum, nickel, chromium, etc., is plated on the surface of the metal connector. Common plating processes include electroplating, hot-dip plating, spray plating, infiltration plating, chemical plating, etc.Chemical conversion film: A stable compound film layer, such as oxide film, phosphate film, chromate film, etc., is formed on the surface of the metal connector by chemical or electrochemical methods to improve its anti-corrosion performance.3. Sealing and isolationSealing process: Through sealing technology, the leakage path followed by moisture and oxygen is closed to prevent the metal connector from corrosion. Commonly used sealants include silicone-based materials and epoxy-based "potting" compounds.Isolation medium: In some cases, the properties of the corrosive medium can be changed to reduce or eliminate harmful components in the medium to prevent the metal connector from corrosion. For example, lime is added to acidic soil for neutralization to prevent soil corrosion.4. Electrochemical protectionCathodic protection method: By applying direct current, the potential of the protected metal connector is changed to make it a cathode, thereby slowing down or stopping corrosion. This method is often used for corrosion protection of underwater or buried metal connectors.Anodic protection method: In some cases, the protected metal connector can also be protected as an anode. However, the application range of this method is relatively narrow and needs to be selected according to specific circumstances.By selecting corrosion-resistant materials, adopting surface treatment technology, implementing sealing and isolation measures, applying electrochemical protection methods, and regularly performing maintenance and inspection, the corrosion problem of intermediate joint metal connectors during long-term use can be effectively prevented.
