Classical gray linen is a kind of high-quality granite with a hard texture and smooth color. It is widely used in the field of architectural stone decoration. Its smooth surface effect is uniform and there are few black guts. It is the highest hardness granite. Due to the chemical composition, classical gray hemp is prone to rust yellow. So, how to prevent rust-yellowness of classical gray granite? Today, let's take a look with the editor of FABULOUS Group.
The rust caused by the rust of the fittings: The rust of the iron fittings when the stone is wet-laid and spreads to the surface of the stone.
Primary rust yellow: because there are usually iron deposits (iron carbonate, iron sulfide, iron silicate hydrochloric acid deposits, etc.) inside the stone, usually iron-containing mineral deposits are relatively stable with iron silicate hydrochloric acid deposits, and iron sulfide is the most unstable. Therefore, unstable iron sulfide can be said to be the biggest cause of rusty yellow pollution on the surface of stone. In addition, although biotite is more stable than iron sulfide, under the action of acid and water for a long time, it will oxidize and rust to form limonite, polluting the stone to form rust yellow;
Rusty yellow caused by improper disposal during stone processing: When the rough stone is cut with steel grit sawing, the surface of the stone is not cleaned due to the remaining steel grit. After the action of water vapor, it forms rust spots or pickling after the stone is cut, leaving acid residue Material formation is caused by accelerated oxidation of stone iron-containing mineral deposits;