The application of garnet in rust
Rust is a kind of loose, porous, and constantly expanding and expanding substances. It is very common around us. There are many ways to remove rust. At present, sandblasting is the most used. If the iron parts are not sandblasted for a long time, the substrate will expand due to the development of rust, which will deform the painted surface, and then cause micro cracks to accelerate the entry of water, oxygen and corrosive ions, thus greatly affecting the anti-corrosion effect of the paint film. As a result, the service life of steel is greatly shortened. In recent years, garnet sand has gradually replaced traditional abrasives for sandblasting and rust removal treatment: due to the high hardness of garnet sand, it not only does not contain free silicon and harmful heavy metals, but also has a Mohs hardness of 7.5-8, second only to topaz, corundum, etc. Gemstones have good toughness and low breakage rate. They can be recycled and reused 5-15 times, and the cost will naturally decrease. The effect is comparable to shot blasting and rust removal, and the pure white cleaning level of Sa3 can be easily achieved. In the past, the quartz sand, river sand, copper slag, etc. used in sand blasting and rust removal not only contain free silicon and harmful heavy metals, but also easily broken during sand blasting and rust removal, resulting in a decrease in sand blasting and rust removal efficiency and an increase in cost. The pomegranate sand has a fast cleaning speed and good cleaning effect, and the sand does not contain free silicon, so there will be no dust flying during the operation, and it is not harmful to the human body.