welding
![welding](https://sheetmetalcover.com/wp-content/uploads/2022/04/2331-300x300.jpg)
Painting requirements Rust, scale, grease, dust, soil, salt and dirt must be removed from the surface of all steel parts…
![aluminum welding](https://sheetmetalcover.com/wp-content/uploads/2022/04/223-300x300.jpg)
Very easy to oxidize. In the air, aluminum is easily combined with oxidation to form a dense aluminum oxide film…