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Treatment Technology of Surface Rust Layer of S355J2WP Weathering Steel

Treatment Technology of Surface Rust Layer of S355J2WP Weathering Steel

In the natural environment, S355J2WP weathering steel can use the protective and stable rust layer generated by itself to prevent further corrosion, so as to realize bare use, omit the traditional paint coating process, and maintain free in the later stage, significantly reducing the cost of the steel structure. use cost. The coating-free application of S355J2WP weathering steel has become a new trend in the field of steel structure construction at home and abroad.

However, it takes a long time for S355J2WP weathering steel to completely form a stable rust layer in the atmospheric environment (generally more than 3 years), which leads to the phenomenon that rust liquid hangs and scatteres and pollutes the environment easily in the early stage of exposed use of S355J2WP weathering steel, which seriously affects The consistency of the appearance color of S355J2WP weathering steel. This has become a bottleneck problem restricting the promotion and application of S355J2WP weathering steel without coating.

Through years of research, a variety of S355J2WP weathering steel surface rust stabilization treatment technologies, such as weather-resistant coating technology, oxide coating film treatment, rust coating nitriding treatment and new surface treatment agents, have been developed successively, and engineering has been realized. application.

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