Characteristics and applications of sandblasting media

2021-11-22 09:25:24 By : Ms. Helen Sun

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Composition Materials provides us with various abrasives for sandblasting, cleaning and stripping of primers, paints, powder coatings, enamel, rust and steel, bronze, aluminum, stone, brick, wood, rubber, plastic and composite materials.

Soft abrasives such as walnut shells, plastic blasting media, and corncobs can remove paint and coatings without causing damage, pitting, or etching.

Hard abrasives, such as steel shot, steel grit, glass beads, and alumina, are used for profiling metal surfaces and shot peening for stress relief.

Abrasives are also used for deburring, tumbling and deburring.

Alumina (Figure 1) is a durable and corrosive abrasive that is widely used for grinding, sandblasting, cleaning and surface treatment.

Figure 1. Alumina abrasive blasting media

The white alumina (Figure 2) has an abrasive purity of 99.4% and is used in the aerospace, medical, cosmetic and dental industries.

Figure 2. White alumina grit

Steel Shot (Figure 3) is a multifunctional abrasive used for sandblasting, cleaning, stripping, surface modification, deburring and finishing of metal surfaces. It produces smooth and polished finishes during finishing operations, larger sizes produce rougher surfaces, and smaller sizes produce smoother finishes.

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Steel grit (Figure 4) is used for sandblasting, cleaning and stripping of cast metal and steel. Aggressive media effectively profile hard metals to achieve better coating adhesion. It is also used for flash removal, rail car refurbishment and forging industry applications.

The hardest blasting medium available is silicon carbide abrasive (Figure 5), which is used for rock tumbling, etching glass, or carving stone. As it does not contain any free silica, it is an excellent substitute for sand. Moreover, it is recyclable and reusable many times.

Glass beads (Figure 6) are used for shot blasting, deburring, polishing and sandblasting operations. It is widely used in rubber, plastic, glass and metal. In addition, the use of glass bead shot peening can effectively solve the problem of stress cracking, even on thin welds and metal parts.

Each blasting job is unique, and blasting parameters need to be selected to obtain the best efficiency, including media size, type, nozzle distance and blasting pressure. Composition Materials provides technical expertise in the selection of media and parameters for specific blasting operations.

This information is derived from materials provided by Composition Materials and has been reviewed and adapted.

For more information on this source, please visit Synthetic Materials.

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