Study of the Effect of Time on the Weight Gained by the Aluminized Method on Some Ferrous Alloys (Steel-H25)

This research aims to modify the surface components of Steel-H25 alloy by the method of surface engineering through the single diffusion coating technique to obtain new alloys with high efficiency in resisting harsh environmental conditions. Steam a mixture of sodium chloride (NaCl) and sodium sulfate (Na2SO4) at a temperature of 900 C° and then compare it with the base alloy. The results showed that the alloys produced in this way are very efficient. The results showed that the aluminum coating showed high efficiency in resisting oxidation and provided better protection for a longer time compared to the uncoated alloy due to the Al2O3 oxide crust layer formed with high adhesion as well as the aluminum-rich phases, whether the phases were nickel-aluminum or iron-aluminum. The results also showed that the weight gain of the alloy is subject to the parabola relationship with time.