In this study, the critical effects of variants in machining behavior on the microcrystalline characteristics and its dependence on the corrosion as well as Impedance behavior of the machined Nimonic 263 alloy have been investigated. Because the resulting effect, which arises from the machining process (slotmilling) with varying cutter nomenclature or terminology (Radial Rake Angle (RRA)) and machining conditions (cutting feed) under constant Minimum Quantity Lubrication (MQL) flow rate plays a vital role in severe deformation process (SDP) on the machined work surface. Additionally, the Electrochemical Impedance Spectroscopy (EIS) analysis has been conducted over the SDP processed surface to analyze the influence of variants in machining behavior over the corrosion performance through the impedance of machined samples and from the above experimentation, it is stated that the SDP through slot milling has a superior influence on the corrosion and EIS behavior leads to reduction in the resistance against the corrosion tendency of the machined samples related to the nascent Nimonic 263 sample.