The present invention provides a simplified, and eco-friendly liquid droplet erosion test rig. The test rig comprises a nozzle, a first pipe connected to a water tank through a pump, a second pipe connected to an air source through a compressor as source of air and test/sample unit for receiving the metal sample. The nozzle sprays a jet of water droplets at a high velocity to erode an area of the test metal. The water supplied to the nozzle through the first pipe is mixed with the compressed air supplied through the second pipe to atomize the water into water droplets and to increase a velocity of the water droplets. The velocity of water droplets sprayed on the sample depends on a ratio of nozzle diameter and air inlet pipe diameter compressed air-pressure and flow rate, and distance between air outlet and the nozzle.
