Iran. A new method of coating the inner surfaces of steel and aluminium tubes, or bars in order to protect them from corroding and erosion, was suggested by Iranian engineers."The surface of the metal is covered by nickel through a mechanical alloy method, for this, nickel powder is combined together with samples of the cubic forms of aluminum to obtain various durations and to withstand different amounts of dust. These operational conditions present different chemical, diffusion, alloy interactions and the formation of new intermetallic phases," explained Rasoul Pouriamanesh, a member of the research team at Ferdowsi Mashhad University (FUM).
Knowing that intermetallic phases such as Ni-Al, Al3Ni and Ni3Al are formed within the coating layer, Pouriamanesh reiterated that these reactions are caused by the increase in temperatures.
The coating layer consists of nanoparticles with different size and distribution. After annealing, the microstructures and particle sizes were investigated in order to find the optimal conditions and obtain a perfect coating for the metal surfaces, according to the researcher.
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