If the welding position is rusty, does it affect the life span? After all, the place of welding is thinner than the channel itself. If it is thick, it will not be afraid. The package is in the shed. How do you handle it?,
It's no big deal. Although not in line with the norms, but usually no problem will be used.
Rust is a common phenomenon, it is a complex process. The rust is process of metal and oxygen in the air, carbon dioxide and water vapor phase. There are many factors affecting metal rust in general, the more pure metal is not easy to rust. Ordinary iron, a rust and moist air. A piece of pure iron is drown in the water a few years or a bit. I am still my old self., not rust. Processing methods have effect on rust. A piece of iron into a crack, then beaten, although no crease, but crease place is easy to rust. The smooth degree of metal the surface rust and also has a relationship, is not easy to rust surface more smooth, more rough, more easy to rust. The metal met local overheating or beat produce thermal stress and mechanical stress of the parts, rusty faster some.
Steel structure steel welded between the floor loading parts will rust; metal after welding, weld metal and crystal itself, the difference is bigger than that in any case. The weld metal surface smooth, this course is more obvious. So in particular is easy to rust to weld metal.
Steel is oxidized, but the degree of oxidation is different. Steel structure is also steel, so it will rust. There are many ways to prevent rust. Brushing antirust paint is a kind of commonly used. If your concrete is not poured on the channel, it is recommended that you expose the exposed parts to antirust paint. When the welding part is welded, it is OK to brush the antirust paint with steel wire brush.
