Grit blasting is a cost-effective and highly efficient way to prepare a substrate or component for non-destructive testing (NDT). Abrasive particles are propelled by compressed air through a nozzle onto the surface of the component or item, removing contaminants such as rust, heat scale and protective coatings so that it can be correctly assessed as part of the non-destructive testing process.
The Advantages Of Grit Blasting For Non-Destructive Testing
While other methods are available for preparing components for non-destructive testing, grit blasting is an extremely popular method of surface treatment, for several reasons:
1) Speed: Grit blasting is considerably quicker than alternative methods, such as wire brushing or sanding.
2) Efficiency: contaminants are removed more effectively, leaving the surface of the component cleaner for non-destructive testing.
3) Cost-effectiveness: grit blasting is a cost-effective solution, as the equipment and the abrasives are relatively inexpensive.
4) Flexibility: several abrasives can be used to achieve a satisfactory finish, including aluminium oxide, glass bead and garnet. Many of the abrasive mediums can be recovered after the process and recycled, minimising impact to the environment.
Why Is Grit Blasting Suited To NDT?
Non-destructive testing will detect the smallest of flaws and defects in the surface of a component, so the cleaning and preparation process must be scrupulous. Any contaminant that remains on the substrate, such as heat scale, rust or protective coating, could conceal defects which has the potential to compromise the integrity of the testing procedure. Even miniscule particles could interfere with non-destructive testing.
Grit blasting offers the most comprehensive, efficient, and cost-effective method for the preparation of components and items for NDT. Other blasting methods, such as shot blasting, can compress the surface and close discontinuities in the substrate, causing NDT outcomes to be inaccurate. As NDT is essential to guarantee the components integrity and fitness for use in a safe and reliable manner, the abrasive cleaning method used must facilitate an accurate testing process, rather than hindering it.
Find Out More
At KUE Group, we can process components and items of different sizes either in our specially designed blast rooms or on-site, achieving the optimum surface finish to prepare components for non-destructive testing. For more information, please speak to one of our blast cleaning specialists today.