Hot-dip galvanizing: This method involves immersing the steel surface in a hot-dip galvanizing bath, allowing it to react with the zinc liquid to form a zinc layer. The coating thickness of hot-dip galvanizing is generally between 45-400μm, which has good corrosion resistance and high layer thickness.
Electro-galvanizing: Electro-galvanizing is a process in which a layer of zinc is plated on the surface of steel through electrolysis. The thickness of electroplated zinc coating is usually thin, about 5-15μm. Due to its lower cost, electro-galvanizing is widely used in automobiles, home appliances and other fields, but its corrosion resistance is not as good as hot-dip galvanizing.
Hot-dip galvanizing and electro-galvanizing are two different methods of metal anti-corrosion treatment. Their main differences lie in the treatment process, coating thickness, corrosion resistance and appearance. Here are the details:
Processing technology.
Hot-dip galvanizing is to immerse metal workpieces in molten zinc liquid for galvanizing treatment, while electro-galvanizing is to immerse workpieces in an electrolyte containing zinc, and a zinc layer is formed on the surface of the workpiece through electrolysis.
Coating thickness.
The zinc layer of hot-dip galvanizing is usually thicker, with an average thickness of 50~100μm, while the zinc layer of electro-galvanizing is thinner, generally 5~15μm.
Corrosion resistance. The corrosion resistance of hot-dip galvanizing is generally better than that of electro-galvanizing because its zinc layer is thicker and more uniform, which better protects the metal surface.
Appearance.
The surface of hot-dip galvanizing is usually rougher and darker in color, while the surface of electro-galvanizing is smoother and brighter in color.
Application scope.
Hot-dip galvanizing is mostly used in outdoor environments, such as road fences, power towers, etc., while electro-galvanizing is mostly used in indoor environments, such as household appliances, auto parts, etc.
In general, hot-dip galvanizing provides a thicker protective layer and longer protection time and is suitable for harsh environments, while electro-galvanizing provides a thinner protective layer and is suitable for applications that do not require high corrosion resistance or have decorative requirements. occasion.
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Post time: Feb-29-2024