Mechanical sand/shot blasting / shot peening surface treatment is the use of high-speed rotation of the impeller, the steel grit along a certain angle high-speed cast to play evenly on the aluminum surface, scraping the formation of uniform fine sand surface processing.Mechanical sand surface has the following advantages: to improve the corrosion resistance of aluminum; to improve the fatigue performance of aluminum,extending its life; optimize the state of the aluminum surface technology;compared with the chemical treatment method, greatly improving the sand surface treatment of productivity and quality; reduce the labor intensity of the sand surface processing; the reduction of environmental pollution.