Hello Rakesh,
Please note that silica sand is no longer recommended for erosion testing due to its carcinogenous nature. You may use alternate media such as garnet, glass beads, crushed glass, coal slag or mineral sand, depending on your requirements (hardness, size, angularity, chemistry etc).
There are a number of suppliers. Search under "blasting media"
Regards,
Ratnesh Dwivedi, Ph.D.
www.rkdengg.com
contact@rkdengg.com
------------------------------
[Ratnesh] [Dwivedi]
[President]
[RKD ENGG, LLC]
www.rkdengg.com------------------------------