There are several common surface treatment methods for cold rolled steel plates that they are pickling, oil coating, electroplating and painting/coating. Firstly, pickling helps to improve the surface cleanliness and remove scale, rust, and other contaminants. It can produce a clean and smooth surface finish with a characteristic matte appearance. secondly, the oil coating provides temporary corrosion resistance and prevents moisture from reaching the steel surface. It can enhance the appearance by providing a smooth and glossy finish. Secondly, electroplating can provide enhanced corrosion resistance, improved aesthetic appeal, and can be used for decorative purposes. Finally, coatings can be applied through methods like powder coating, liquid coating, or hot-dip coating. Paints and coatings can offer a wide range of colors, textures, and finishes.

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