Rasp Sand
- Tuna Silica Sand
- January 01, 2019
What is Raspa; Due to the effect of steel on contact with oxygen in water and some acids, the metals oxidize over time and rust. It decays over time and becomes unusable. In order to prevent the steel from coming into contact with oxygen, it should be sandblasted by industrial sandblasting and scraping method. For this purpose, silica sand is used as sanding material in all steel materials.
Basalt, iron grit, steel grit and steel ball products are also used in the sector for rasp blasting. Scraper sands are used in various sizes according to the metal's technical properties and corrosion rates. Coarse granulated sandblasting products are generally preferred for high corrosion and thick materials. Fine granulated products should be used for more sensitive sandblasting and fine materials.
It is the impact of Raspa Kum on metal surface with high pressure air. During this collision, while sand abrades the metal surface in the micron range, it also digs and cleans any unwanted material on the surface.
Sandblasting should be done as soon as possible in dry weather and paint should be started. Because, after cleaning the rust and unwanted formations on it, steel is more vulnerable to corrosion. If the weather is damp, sandblasted steel begins to darken and rust immediately.
Raspa Features:
Sa 1: It is an extremely superficial cleaning degree. It is a very superficial cleaning method on rusted surfaces and it is called as sweeping in the market.
Sa 2: It is a highly cleaned state of rust and unwanted formations on rusted surface. The unique gray color of the steel can be easily selected. It is a sandblasting degree that is not preferred in the market. Because it is too much for superficial cleaning but also insufficient for a thorough cleaning.
Sa 2,5: It is the most preferred blasting degree in the market and it is the steel free of all kinds of rust and unwanted formations. The unique gray color of the steel has been completely revealed.
Sa 3: It is the highest cleaning degree that can be done in the blasting process and it is not preferred in the market just like Sa 2. Because its cost and application time is quite high. It also means that the steel is corroded even in the micron range. This contradicts the purpose of protecting the original steel.