How do garden tools remove rust stains?

1. Manual rust removal
Manual rust removal is the most primitive rust removal method. Use abrasive cloth, sandpaper, scraper, wire brush, hammer chisel and other tools to remove rust, scale and impurities by manual hammering, grinding, scraping and sweeping. Thing.
2, machine polishing
Mechanical sanding is to remove the rust layer by means of impact and friction with the force of mechanical driving. For example, abrasive cloth, sandpaper, abrasive paste, wire brushes, etc. are fixed on the roulette. When the roulette is rotated, it can be polished and polished on the rusted part of the metal, thereby removing the rust.
3, Roller derusting
Roller rust removal is to place metal workpieces and pig iron castings without irregular angles and external threads in slow-rotating hexagonal or circular rollers. Due to the rotation of the rollers, the rust is removed by the impact of friction and rolling. And oxide scale and other dirt.
4. Flame derusting
Flame rust removal is suitable for the rust removal of steel structures and castings with a certain thickness. The principle is to use the difference in thermal expansion coefficient between metal and oxide scale. After heat treatment, the oxide scale will crack and fall off, and rust will be dehydrated due to heating. To make the rust layer crack and loosen.
5. Electric spark rust removal
Electric spark rust removal is the use of scale and steel plate with different electrical conductivity and thermal expansion changes to remove rust. The cleaned metal workpiece is used as one electrode and the round roller is used as the other electrode. When the round roller contacts the workpiece, a short circuit occurs to separate the oxide scale, and the rust is separated from the surface of the workpiece by the mechanical impact force....