Dry sandblasting vs Wet sandblasting vs Vacuum sandblasting-Honest Horse china garnet sand

Dry sandblasting vs Wet sandblasting vs Vacuum sandblasting

Sandblasting for rust removal is one of the high-quality surface pre-treatment methods. It not only can completely remove the oxide scale, rust, old paint film, oil stains and other impurities from the metal surface, making the metal surface show a uniform metallic color, but also can give the metal surface a certain roughness to obtain a uniformly rough surface. It can also transform the mechanical processing stress into compressive stress, improving the adhesion between the anti-corrosion layer and the base metal as well as the corrosion resistance of the metal itself.

There are three types of sandblasting: dry sandblasting, wet sandblasting and vacuum sandblasting. Do you know their respective advantages and disadvantages?

I.Dry sandblasting:

Advantages:

High speed and efficiency, suitable for large workpieces and applications requiring the removal of heavy dirt.

Disadvantages:

Generates a large amount of dust and abrasive residue, which can cause environmental pollution and abrasive retention. Static adsorption of abrasives is a common problem.I.Surface strengthening:

Shot blasting forms residual compressive stress on the surface of parts by high-speed shot blasting, thereby improving the fatigue strength and wear resistance of materials.

II.Wet sandblasting

Advantages:

Water can wash away abrasive materials, reduce dust, leave less residue on the surface, and prevent static electricity adsorption. It is suitable for decontamination and surface treatment of precision parts, avoiding additional damage to the workpiece surface.

Disadvantages:

The speed is slower than that of dry sandblasting. The water medium may cause corrosion to the workpiece, and the issue of water treatment needs to be considered.

III.Vacuum sandblasting

Vacuum sandblasting is a type of dry sandblasting. It is a specific method in dry sandblasting technology that uses vacuum tubes powered by compressed air to accelerate the spraying of abrasive materials. Dry sandblasting is divided into air jet type and centrifugal type. Vacuum sandblasting belongs to the air jet type and uses air flow to spray abrasive materials at high speed onto the surface of the workpiece for processing. It is particularly suitable for workpieces that are not suitable for water or liquid treatment.

Advantages:

The workpiece and abrasive are completely sealed within the box, preventing any dust from escaping. The working environment is clean and there will be no abrasive particles flying around in the air. This is suitable for processing precision parts with extremely high requirements for the environment and the surface accuracy of the workpiece.

Disadvantages:

The operation speed is slow. It is not suitable for processing large workpieces and the equipment cost is relatively high.