Blasting Process

"Blasting Process"

After doing surface preparation, now we carry on to blasting process. Here I provide the article of  in order to make surface treatment completed in the right procedure. Here type of blasting process.

Shot Blasting - A rapid, dust free process that leaves the substrate clean and dry. Shot blast machines hurl shot toward the intended surface at a high speed, removing debris, paint and buildup from the surface.

Sand Blasting - Procedure for cleaning of metal surfaces, for which fine silica sand is blasted through a nozzle onto the surface by means of compressed air to remove scale as well as other coverings.

Grit Blasting - A technique of abrasive cleaning or surface preparation using sharp particles (e.g. cast iron shot, aluminum oxide). It covers such processes as removal of scale, corrosion, paint and other surface films. Use of free silica presents a health threat and should be avoided. Increasing of coating adhesion on surfaces can increase the life time of coating, safety factor of transmitting line pipe and decreasing the rate of corrosion and costs. Preparation of steel pipe surfaces before doing the coating process is done by shot and grit blasting. This is a mechanical way to do it.

Some effective parameters on blasting process:
1. Particle size of abrasives, 

2. Distance to surface, 

3. Rate of abrasive flow, 

4. Abrasive physical properties, shapes, selection of abrasive, kind of machine and its power,
5. Standard of surface cleanness degree, 

6. Roughness,
7. Time of blasting and 

8. Weather humidity.

Enviro-Grit sandblasting abrasives are a reusable recycled glass product that is 100% free of crystalline silica. Excellent for use on steel, aluminium, concrete, and wood, we stock general purpose (12-50 and 20-50 grit), and fine (30-60 grit) to make sure we have the best product for your project. Put simply, Enviro-Grit abrasives are setting the industry standard for worker safety, environmental protection, and superior cutting power, because Enviro-Grit is made from recycled glass (and contains no ingredients which are harmful to the environment), the abrasives are inert, non-flammable, non-corrosive, and non-fibrogenic.

After you read the blasting process for the next article will talk about surface finish standard. It will be glad if you put you question in comment box, and also put your constructive critic and advise.