Will A242 Type 1 weathering steel form a stable rust layer after painting?

A242 Type 1 weathering steel, ie atmospheric corrosion resistant steel, is a low alloy steel series between ordinary steel and stainless steel. A242 Type 1 weathering steel is made of ordinary carbon steel and a small amount of corrosion-resistant elements such as copper and nickel. Steel toughness, plastic deformation, forming, welding, abrasion, high temperature, fatigue resistance, etc.; A242 Type 1 weather resistance is 2 to 8 times that of ordinary carbon steel, coating is 1.5 to 10 times that of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, anti-corrosion and life extension, thinning and reducing consumption, saving labor and energy.

A242 Type 1 weathering steel is mainly used for steel structures such as railways, vehicles, bridges and towers that have been exposed to the atmosphere for a long time. It is used to manufacture structural parts such as containers for containers containing hydrogen sulfide corrosion in containers, railway vehicles, oil derricks, seaport buildings, oil production and chemical petroleum equipment.

Corroded steel sheet refers to a low-alloy structural steel with a protective rust layer resistant to atmospheric corrosion and can be used to manufacture steel structures such as vehicles, bridges, towers, and containers. Compared with plain carbon steel, A242 Type 1 weathering steel has better corrosion resistance in the atmosphere. Compared with stainless steel, A242 Type 1 weathering steel has only a small amount of alloying elements, such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, titanium, etc. The total amount of alloying elements is only a few percent, unlike stainless steel. , reaching more than ten percent, so the price is relatively low.

When a trace element such as phosphorus, copper, chromium or nickel is added to the steel, a dense and highly protective film is formed on the surface of the A242 Type 1 steel, which hinders the diffusion and development of the rust, and protects the substrate under the rust layer to slow down the A242. Type 1 corrosion rate. Amorphous spinel type oxidation of about 50 μm to 100 μm thick formed between the rust layer and the substrate

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