Surface preparation is the key factor in determining the success of a protective coating system. The
objective of surface preparation prior to applying a coating system is to create proper adhesion of the coating to the original surface. Proper adhesion will occur if a suitable level of surface cleanliness and roughness (profile) is achieved.
Wet Sand blasting is a common procedure for removing paint and rust from steel or other metal surfaces. As shown in the CD, with this procedure, a dry abrasive material or sand is mixed with the water jet to create an abrasive spray. This abrasive spray is blasted on the surface, which breaks away small piece of undesirable coating corrosion or other undesirable substances to create the desired white metal finish, perfect for recoating.
Nozzle used in wet sand blasting consists of an ejector, which works on the principle of venturimeter. As soon as high pressure water passes through this ejector, vacuum is created and to this vacuum portion taping is provided to a suitable source of sand. As a result of this suction, sand is sucked inside and at the end through the spraying nozzle an abrasive fluid comprising of water with sand passes with high velocity. To avoid excessive wear, discharge nozzle tip is made up of tungsten carbide.
applications of wet sand blasting
Wet sand blasting technology can be used for preparing surface prior to coating, for rust removal, de-burring, flash removal, etc. Please find below herewith list of some applications wherein this method can be used
Paint, grease and rust, corrosion, scale removal
Paint removal from ship hull
Clean and peen precision parts
Clean areas not accessible to hand sanders
Produce and anchor pattern ideal for uniform finishing
Deburr and finish machined parts
Blend light scratches and tool marks
Deflash plastic and metal parts
Chewing gum removal
Stone & Marble Cleaning
Surface preparation of plates and other structures.
Laitance removal from concreter surface and walls.
Please note as herein we are using sand or other abrasive material along with high-pressure water, it will make the parent surface rough, degree of which depends upon the size of sand particles used. Hence one cannot use this method on any surface, which is already grounded or finished.
advantages of sand blasting over other conventional methods
Wet sand blasting is widely used in various industries for different applications as it offers following advantages vis-à-vis other conventional methods.
Because of the water ingredient, it will not create any environmental pollution problem caused by fluttering the micro power.
It can remove the burrs (surface projections) and scales formed on surface and clean the surface without damaging the working piece.
The surface finishing can access a homogeneous matter finish (spot pattern). It can contribute significantly to the finishing demand for surface roughness.
It only applies small shot blasting effect to the surface to be finished and improve and reinforce the material of work piece.
The foreign materials after being removed will be rinsed and flushed out by the jet of water.
It doesn’t affect the dimensions of the object.
Contact Name: Sharad Parmar
Company Name: Pressurejet Systems Pvt. Ltd.
Street Address: 62/13, PhaseIi, Nr.
Patels Airtemp, Gidc, Vatva,
Ahmedabad 382 445, Gujarat, India
Member name: pressurejet
Member Since: 19 September 2009
Total Leads: 48 pressurejet Import Export Business Leads
Business focus: High Pressure Triplex Plunger Pump, Reciprocating Piston Pump, Hydrostatic Hydrotest Pump, Car Power Pressure Washer Pump, High Pressure Cleaners
Verify: Safe Import Export Tips