Brown-Fused Alumina Shot-Blasting Grit
Brown fused alumina (BFA) is a type of shot blasting media that is commonly used in surface preparation processes. It is made by fusing high-quality bauxite and other raw materials in an electric arc furnace, then cooling and crushing the resulting molten mass into abrasive grains. BFA is a tough and durable abrasive that is well-suited for use in blasting applications.
One of the main benefits of brown fused alumina is its high hardness. BFA has a Mohs hardness rating of 9, which is second only to diamond in terms of hardness. This means that it is able to remove even the toughest coatings and surface contaminants, including rust and scale. Its high hardness also allows it to maintain its shape and sharpness throughout the blasting process, which means it can be used for longer periods of time than other types of abrasives.
Another advantage of brown fused alumina is its low friability. This means that it does not break down easily during blasting, which reduces dust and results in a more consistent finish. Additionally, BFA is chemically inert, which makes it safe for use on a wide range of surfaces without causing damage or contamination.
Brown fused alumina is available in a variety of grit sizes, from coarse to fine. Coarse grits are typically used for heavy-duty surface preparation tasks, such as removing thick coatings and preparing metal surfaces for painting or powder coating. Fine grits are commonly used for light surface cleaning and finishing work, such as removing light rust and smoothing rough edges.
In addition to its use as a shot blasting abrasive, brown fused alumina is also used in other applications, such as grinding, cutting, and polishing. It is particularly well-suited for applications where a tough and durable abrasive is required, such as in the manufacture of automotive parts and aerospace components.
Overall, brown fused alumina is a reliable and versatile shot blasting abrasive that is well-suited for a wide range of surface preparation tasks. Its high hardness, low friability, and chemical inertness make it a popular choice for industrial and commercial applications, where consistent and effective surface preparation is essential.
