The Effect of Some Physical and Mechanical Properties of Cermet Coating on Petroleum Pipes Prepared by Thermal Spray Method

摘要

The cermet materials have wide industrial applications, one of which is the protection of damaged petroleum pipelines as a result of working and environmental conditions coated with those materials. The current research aims to treat damaged parts of petroleum pipes, turbine blades and other parts of the devices which are exposed to heat and damage. Using thermal spray method with different spraying distances (8, 10, 12, 14 and 16 cm), the coating material ensures the foundation (TiO2) and supportive material (Al-Ni) with supportive ratios (25, 35, 50 and 65%) for the formation of cermet coatings. Physical tests (porosity and adhesion force) as well as mechanical (hardness and wear rate), compositional tests (atomic force microscope) were conducted for only 2 h before and after heat treatment (1000 degrees C) The results showed that the best supportive ratio is 50% and the best spray distance is 12 cm at heat treatment (1000 degrees C) for 2 h, where the porosity gave a magnitude of 8.1% and adhesion force of 27.6 Mpa, the hardness is 42.4 H-v and the lowest wear rate at the sliding speed is 4.5 m/s. Meanwhile, atomic force microscope clarification to be the best topographical surface was at the same standard conditions mentioned above. Microscopic hardness was also calculated at different temperatures (450, 650, 850, 950, 1150 degrees C). It was observed that the best hardness value was with heat treatment at 950 degrees C.