Tungsten is a prime candidate for plasma-facing components (PFCs) in fusion reactors. Being a refractory metal, W exhibits exceptional high-temperature properties, making it an attractive material for components exposed to the extreme conditions of fusion plasma . Of all metallic elements, W has the highest melting point (3422 ℃), and at elevated temperatures, it exhibits the highest tensile strength among metals . Additionally, W shows exceptional corrosion resistance and is highly resistant to attacks by mineral acids. An important advantage of W is its high threshold energy of sputtering, around 150-200 eV for Deuterium (D) , which helps minimize wall erosion. However, erosion could also occur due to unavoidable impurities, which reduce the threshold value of the D sputtering energy . For example, the threshold energy for the sputtering of W-oxide by D is as low as 65 eV due to the low binding energy of the W-O molecules. Tungsten erosion poses a significant challenge for fusion reactors, as it can impact the lifespan of plasma-facing materials and the overall performance of the reactor. Additionally, the theoretically the effect of chemical sputtering of O on W erosion at temperatures of 1500-2000 K at different O pressures . The introduction of an adequate amount of O to the tungsten surfaces results in the chemical sputtering of WOx molecules, thereby reducing the threshold energy for sputtering with D. W sputtering by D was observed in the presence of 10 -2 Pa of O2 gas at energies below the D-W sputtering threshold . W oxidation has been observed at temperatures below 1500 K, even at room temperature .