Significance of S355J2WP weathering steel plate surface coating

1. The protective coating (oxidation film) formed on the surface of S355J2WP weather-resistant steel plate is an important component of weather-resistant steel plate, and its function is closely related to the surface condition of S355J2WP weather-resistant steel plate. The protective coatings on the surface of S355J2WP weathering steel plate is as follows: galvanized, phosphating and organic coatings, among which phosphating and organic coatings are the most widely used.

2. In order to prevent corrosion, a protective layer (passivation film) is formed on the surface, which can make the metal react with oxygen in the atmosphere to become a non-corrodible metal.

3. A protective coating (oxidation film) is formed on the surface of the S355J2WP weather-resistant steel plate, which can prevent the oxygen in the atmosphere from corroding the steel, and at the same time prevent the oxidation of the properties of the steel by acid, alkali, salt and other media.

4. To prevent corrosion or oxidation of S355J2WP weather-resistant steel plate, it is mainly realized by the protective layer (passive film). The protective layer (oxidation film) of S355J2WP weathering steel plate reacts chemically with the oxygen in the environment where it is located, and becomes a metal that is not easy to corrode.

5. A protective layer (passive film) is formed on the surface of the S355J2WP weathering steel plate, which is to form a dense, uniform and chemically stable protective layer on the surface of the steel with certain mechanical properties and toughness, so that the steel has certain corrosion resistance and high weather resistance.