Dec 18, 2018
© Henri Coudoux
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© Henri Coudoux
https://www.cnsststeel.com
Can galvanized steel plate rust?
Galvanized steel plates will rust under certain conditions. Although the surface of galvanized steel plate is electroplated with a layer of metallic zinc, this layer of zinc has a corrosion-resistant effect, making galvanized steel plate have strong corrosion resistance under normal circumstances and not easy to rust. However, its rusting condition is influenced by various factors, as follows:
1. Environmental factors
Outdoor environment: Placing galvanized steel plates outdoors for a long time may gradually damage the galvanized layer due to natural factors such as wind, rain, and sun exposure, leading to rusting of the steel plates.
Indoor environment: Compared to outdoor environments, indoor environments have a relatively small corrosive effect on galvanized steel plates. But if the indoor environment is humid or the board comes into contact with corrosive liquids, it is still possible to rust. Therefore, keeping the room dry and avoiding water stains and corrosive liquids on galvanized steel plates can prolong their rusting time.
2. Quality of galvanized steel plate
Galvanized layer thickness: The thickness of the galvanized layer directly affects its corrosion resistance. The thicker the galvanized layer, the stronger the corrosion resistance and the less likely it is to rust.
Quality of galvanized layer: If the galvanized layer contains impurities such as iron and other metals, it is easy to produce corrosive effects, thereby accelerating the rusting process of galvanized steel plates.
3. Usage of steel plates
Scratching and collision: During use, if the sheet is scratched or collided, it may damage the galvanized layer on its surface and cause local rusting.
Welding and cutting: When welding or cutting galvanized steel plates, high temperatures may damage the galvanized layer, making the steel plate more prone to rusting at the welding or cutting site.
4. Galvanized type
Cold plating: Relatively speaking, cold plated galvanized steel plates have weaker corrosion resistance and are more prone to rusting. Hot dip plating: Hot dip plated plates undergo high-temperature treatment, resulting in a tighter bond between the galvanized layer and the steel plate, stronger corrosion resistance, and less susceptibility to rusting. In summary, although galvanized steel plates have strong corrosion resistance, they can still rust under certain conditions. In order to extend the service life of galvanized steel plates, attention should be paid to factors such as the usage environment, quality of galvanized steel plates, and usage conditions. At the same time, when choosing galvanized steel plates, different types of galvanized steel plates can be selected according to specific needs to meet different corrosion resistance requirements.
https://www.cnsststeel.com
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