The Effect of Some Physical and Mechanical Properties of Cermet Coating on Petroleum Pipes Prepared by Thermal Spray Met
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TECHNICAL ARTICLE—PEER-REVIEWED
The Effect of Some Physical and Mechanical Properties of Cermet Coating on Petroleum Pipes Prepared by Thermal Spray Method Salih Y. Darweesh . Abdullah M. Ali . Ziad T. Khodair . Zuheer N. Majeed
Submitted: 9 March 2019 / in revised form: 10 September 2019 Ó ASM International 2019
Abstract 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 °C) The results showed that the best supportive ratio is 50% and the best spray distance is 12 cm at heat treatment (1000 °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 Hv 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
S. Y. Darweesh Physics Department, College of Education, Tuzkormato, University of Tikrit, Tikrı¯t, Iraq A. M. Ali Z. N. Majeed Physics Department, College of Education and Pure Science, University of Tikrit, Tikrı¯t, Iraq Z. T. Khodair (&) Physics Department, College of Science, University of Diyala, Baqubah, Iraq e-mail: [email protected]
temperatures (450, 650, 850, 950, 1150 °C). It was observed that the best hardness value was with heat treatment at 950 °C. Keywords Compositional tests Microscopic hardness Atomic force microscope Wear rate Composite materials Adhesion force
Introduction Surface engineering technology has led to significant developments, and under the effect of requirements of rehabilitating parts that are exposed to damage, they are returned to service, reduce cost, improve performance and obtain the appropriate technical properties in many research technology procedures. For this purpose, heat spraying is used to give a protector cover with thickness ranges of 50 lm to 2 mm and high-performance coating materials, which include metals alloys, cermet materials and composite materials for various industrial applications [1]. The process of rehabilitation and the returning the petroleum pipelines and feathers turbines to have them serviced again after processing and protecting the surfaces from rend or crakes is of great importance due to the high cost of pipes and feathers, as well as
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