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Manufacturing Technology Insights | Thursday, February 02, 2023
Corrosion can be prevented in various ways, such as the application of powder coat and protective coating, using drying agents, and the metal layer.
FREMONT, CA: One of the greatest enemies of metals is corrosion. The reaction between metal and environmental factors causes it to occur naturally.
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Corrosion can compromise the appearance of metals and, even worse, reduce their strength and load-bearing capacity. Fortunately, corrosion prevention methods can extend the life of metal equipment by up to 250 percent.
There are different types of corrosion prevention methods. Based on the type of metal and environmental factors, the right method must be chosen.
Metals that resist corrosion: Corrosion can be prevented by using metals that are not prone to corrosion. Aluminum and stainless steel are examples of these materials.
It is possible to reduce the need for corrosion protection by purchasing metals that do not corrode easily, especially if they are not used near water.
Corrosion can be prevented in the following ways:
Protective Coating: Painting the metal structure will enhance its appearance and prevent corrosion. There are, however, some paints that are more effective at preventing corrosion than others. Rubber paint prevents corrosion by acting as a barrier between the metal's chemical structure and environmental compounds like water and oxygen.
Another effective corrosion prevention method is to apply a powder coat. A smooth protective film is formed by heating the powder coat applied to the metal. Nylon, urethane, polyester, epoxy, and acrylic powders are the most commonly used powders. The poly coating can also prevent corrosion to some extent and hide imperfections caused by contact with mill rollers.
Corrosion inhibitors: Corrosion inhibitors are chemicals applied to metal surfaces that suppress corrosion by reacting with the metal or the surrounding gases.
Plating of metal: In theory, plating is similar to painting. Instead of painting, a thin layer of metal is applied to the metal that needs to be protected. A metal layer prevents corrosion and adds aesthetic appeal.
Metallic plating can be divided into four types:
• The electroplating process: In an electrolyte bath, chromium or nickel is deposited on the substrate metal.
• Plating by mechanical means: A metal powder is cold welded to the substrate.
• Hot dipping: A thin protective layer is formed around the substrate metal by immersing the substrate in a molten bath of protective metal.
• Electroless: A chemical reaction deposits a coating of nickel or cobalt on the primary metal. There is no need for an electric current to complete the method.
Adopting measures to protect the environment: Corrosion is heavily influenced by the environment. Corrosion can be prevented or reduced by controlling the environment. Both simple and complex methods can be tried.
Simple solutions include reducing moisture exposure, while complex ones include controlling oxygen, sulfur, or chlorine levels.
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