When selecting the right blasting media for metal surfaces, it is essential to consider factors such as the material’s hardness, the desired finish, and environmental impact. Choosing the wrong media can lead to excessive wear, surface damage or ineffective cleaning. Below are key considerations for selecting the most appropriate blasting media for different applications.
Consider the Surface Material
Different metals require specific blasting media to achieve optimal results. Softer metals, such as aluminium and brass, benefit from gentler abrasives like plastic beads or walnut shells to avoid surface etching. Harder metals, including steel and iron, can withstand more aggressive media, such as steel grit or aluminium oxide which effectively removes rust, paint, and scale without damaging the substrate.
Remove Paint Effectively with Aluminium Oxide
Aluminium oxide is a highly durable and sharp blasting medium that excels at paint removal, cleaning and surface preparation. It is widely used for hard anodising applications, where achieving a clean and smooth surface is essential for proper coating adhesion.
For those interested in learning more about hard anodising applications, consider checking out an expert such as www.poeton.co.uk/surface-treatments/anodising/hard-anodising/.
Choose Plastic for Automotive and Aerospace Needs
Plastic media is ideal for delicate applications in the automotive and aerospace industries. Its softness allows for effective paint and coating removal without causing damage to lightweight materials such as fibreglass and composites. Additionally, plastic media generates minimal dust, improving workplace safety and visibility.
Achieve a Smooth Finish with Glass Beads
For applications requiring a bright, polished finish, glass beads offer an excellent solution. Made from fine soda-lime glass, they provide minimal stress on the surface while delivering a uniform, satin-like finish. Glass beads are also recyclable, making them a cost-effective and environmentally-friendly choice.
Avoid Sand as a Blasting Medium
Although “sandblasting” is a common term, using sand as a blasting medium is no longer recommended due to health and equipment concerns. Sand contains silica, which can lead to severe respiratory issues and its high moisture content can accelerate equipment wear. Instead, consider safer and more effective alternatives such as aluminium oxide or steel grit.
