Things to know when considering abrasive blasting in Queensland
When metal is exposed to water and air the result is often corrosion. Being that water and air are both naturally occurring elements this makes corrosion difficult to avoid. Nevertheless, there is a way to get rid of corrosion and restore a clean, smooth surface before applying a protective coating to prevent further damage — abrasive blasting. Mackay residents should, however, be aware of a few things before considering abrasive blasting.
Abrasive blasting is a not a job for amateurs
Abrasive blasting involves the firing of highly pressured abrasive particles at a metal surface. This stream cleans and smooths the surface much like the way sand blowing over rocks in the dessert can slowly shape and smooth the surface of stone over time. The sheer velocity of the particles just significantly accelerates the process. As one can imagine, such a process can prove dangerous to anyone or anything in the near vicinity. This is why only licensed, reputable professionals should undertake abrasive blasting. Mackay is home to some such professionals.
The material used in abrasive blasting matters
Depending on the extent of damage to the metal surface and the type of surface being cleaned, different abrasive particles can be implemented. In general, two main categories of abrasives are used, metallic and non-metallic. Metallic abrasive blasting materials utilise recycled metal products such as steel, stainless steel, copper, aluminium or zinc shot. While non-metallic abrasive materials are usually less expensive and include materials such as walnut shell, silica, garnet, and copper, coal, or iron slag.
It should be noted that some areas of Australia have regulations on which materials can be used for abrasive blasting. Mackay area abrasive blasters should be able to advise clients of their options as well as recommend the best choice for the job.
There are different levels of abrasive blasting
In addition to different blasting materials, there are also various levels of blasting that can be attained. These levels are often broken into three classes. Class one abrasive blasting is a light cleaning that removes surface mill scale, rust, and debris. Class two, or a medium cleaning, removes more substantial mill scale, rust, and debris without removing much of the surface of the metal. Class three, sometimes called “white-metal blasting,” restores the surface to clean, smooth metal essentially removing a thin layer of the metal’s surface right along with corrosion and debris.
The condition and material of the metal, abrasive used, blasting method and even angle of blasting can affect the outcome of corrosive blasting. Mackay based abrasive blasting experts, Diamond Protective Coating Services can also evaluate what class cleaning is required for a good adhesion of protective coatings and how best to achieve that result.