**3. Results and Discussion**

In the present study, 2025.8 mm<sup>2</sup> surface area of Inconel 718 was in contact with the electrolyte throughout the tribocorrosion testing. Within this area of contact, the cyclic 10 mm reciprocating sliding of alumina ball on Inconel 718 surface was the depassivated area (anode), and the remaining unworn surface was the passive area (cathode), thus completing the galvanic couple. The tribocorrosion test was conducted at ±5 mm/stroke sliding cycle for 60 min; the sliding speed was 0.01 mm/s at a normal load of 50 N. The tests were conducted at laboratory conditions of 24 ◦C lab temperature and 20% relative humidity. During the reciprocating tests, potential and current values were recorded on the potentiostat while the wear and friction force was recorded on the tribometer, in-situ. A summary of the observed and calculated (using Equations (1)–(4)) results are shown in Table 1, and their implications are discussed in the following sections. A strong synergistic effect was observed on the Inconel Wrought sample with a synergistic factor of 124.93. It is significantly higher compared to that of the Inconel AM sample. By resolving the synergistic effect into wear and corrosion, the component shows a strong effect of corrosion on wear for Inconel wrought. The higher value of Δ*Wc* in the case of Inconel AM suggests that mechanical wear is drastically influenced by corrosion. Whereas the effect of wear on corrosion is negative that is possibly due to corrosion protection by wear debris. These synergistic terms are discussed in terms of wear volume and corrosion rate in the next subsection.


**Table 1.** Material loss rate for Inconel AM and Wrought sample during tribocorrosion.
