Imagine for a moment that ACME Coatings Contractor has recently completed an important water tank exterior coatings project. The job, which involved removing lead-based paint from the 40 meter (135-ft) tall, 3.7-million liter,legged tank, went well from start to finish. The owners are happy, final payment has been rendered, and the project manager is filing the last bit of paperwork when the owner’s representative calls and asks, “Out of curiosity, how can we be sure that ACME didn’t leave lead dust under or around the tank?”
B. C. Tilghman: The Father of Sandblasting and Abrasive Nozzles
The process of sandblasting as we know it today started around 1870 with a man named Benjamin Chew Tilghman, who observed abrasive wear on wind-blown desert windows. Tilghman also noticed the effect that high-velocity sand could have on hard material and began designing a machine that could propel sand at speeds much faster than the wind - and could concentrate this flow into a small stream.