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03

01

2024

Application of galvanized steel roll on car body

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With the development of the automobile industry, in order to meet the corrosion resistance requirements of different usage environments, the requirements for body materials are getting higher and higher. Relevant salt spray experiments show that the salt spray corrosion resistance time of galvanized steel roll is 2-3 times that of ordinary cold-rolled steel. Therefore, the extensive use of galvanized steel roll on the exposed parts of the car body is an effective way to improve the corrosion resistance of the car body.

While improving the safety, energy saving and comfort of the entire vehicle, improving the corrosion resistance of the vehicle body and extending the life of the vehicle body are important indicators to measure the quality of the vehicle. One of the important ways to improve the corrosion resistance of the vehicle body is to use galvanized steel roll instead of non-metallic steel roll. Galvanized steel. People began to use galvanized steel roll in the 1970s. Since then, the proportion of galvanized steel roll used in the automobile manufacturing industry has continued to increase.

At present, galvanized steel rolls widely used on automobile bodies include: hot-dip galvanized sheet (GI), alloyed hot-dip galvanized sheet (GA), electroplated pure zinc sheet (EGI), electroplated nickel alloy sheet (EGA), etc.

So far, European cars mostly use hot-dip pure zinc sheets, and Japanese cars mostly use galvanized titanium alloy sheets. Electro-galvanized sheets are relatively expensive and are mainly used for exterior panels of high-end models.

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