Laser deposition of Inconel 625 is highly sought after for cladding on parts having application in corrosive environments [1]. But the implication on deposit quality/ property due to material dilution from underlying parts has not been widely studied. Therefore, laser deposition of Inconel 625 was carried out on SS 304L to understand the influence of Fe dilution from steel substrate and its influence on the corrosion property of deposits. Online monitoring of thermal signature during laser deposition was performed using an infrared pyrometer. The thermal signature showed an early initiation of solidification shelf at higher temperatures with the increase in laser input power from 600 W to 1200 W thus indicating the possibility of early nucleation. Higher fluence led to an increase in penetration depth and molten pool life coupled with a greater extent of Maragoni convection thus resulting in higher % Fe dilution [2]. This increase in Fe dilution from the SS 304L substrate might have caused early nucleation due to the formation of higher melting point iron carbides within the deposits. The EDS and XRD data also reveal an increment in % Fe dilution with the increase in laser fluence. This increase in Fe dilution might have an impact on the corrosion property of deposited Inconel 625 on SS 304L. Potentiodynamic polarization test was performed in a simulated seawater medium to understand the impact of Fe dilution on the corrosion property of deposited Inconel 625 on 304L. Tafel plot obtained from EIS data showed lower Ecorr values for samples deposited under 1200 W as compared to 600 W. Formation of passivation at comparatively lower currents could be seen for deposit conditions of 600 W and 800 W compared to 1200 W. Similar trend was also reflected in Nyquist plot, where a lower radius of curve was observed for 1200 W laser power compared to 600 W depicting lower resistance towards corrosion. From the corrosion results, we can conclude that the increase in Fe dilution from SS 304 L substrate into the deposited Inconel 625 reduced the corrosion resistance property. Possible prediction of corrosion behaviour of deposition at varying laser fluence condition can therefore be executed directly from insitu thermal signals obtained from IR pyrometer during the laser material deposition itself. Using this understanding, we can predict the nature of deposited surface and thus ensure better laser-coated surface with optimized laser input conditions as well as minimum number of cladding layer to obtain a perfect coating, especially for corrosion-prone environments.