Figure 13: Optical phase analysis of (a) Yittria dispersed duplex stainless steel (b) Yittria dispersed ferritic stainless steel (c) duplex stainless steel (d) ferritic stainless steel after corrosion in 2M H2SO4 solution using Axio Vision Release software. (Red-Corroded stainless steel, Green- Unaffected stainless steel).