When the material interacts with its surroundings, the deterioration of the material's important properties is referred to as corrosion. Substancesusedasconstructionmaterialprocessingequipment, includingtheproduct from it, called materials. These materials can be metals and their alloys,composites,polymers,ceramics, etc., Corrosion is commonly known as rust. Generally, Iron and its alloys are the most commonlyused materials opted to design different structural component, and thus are largely affected by corrosion inthis aspect understanding of corrosion study plays a very vital role. Our work includes the use of the thermalspraybyDgunmethodonthreedifferentInconelmaterials600,625and718arecoatedwithnickelchromium & average thicknesses of 61.34µm, 67.97µm and 60.84µm obtained. The nickel chromium coatedmaterials then undergo acid corrosion and salt corrosion tests. In Acid Corrosion test, The Inconel coatedsubstrates were subjected tolaboratory corrosion tests utilizing glass flask and chemicals of the reagentgrade. The specimen has adimension of (15*20*6) mm.The three Inconel specimens 600, 625, 718 aresoaked in three different beakers containing a capacity of 60ml HCl concentrated for 72 hours. For threedifferent Inconel specimens 600, 625, 718 using Salt spray test rig Salt corrosion test is conducted withtemperature range 35°Cto65°C and corrosionrate is calculated. Finally, after the acid corrosion test onthree Inconel 625 shows aweight reduction of 0.28% and in salt Inconel 625 shows the average corrosionrate of 38.5Mpy. Hence it isconcludedthatInconel625materialhasmaximumcoatingthicknessascompareto Inconel 600 & 718 coated material therefore Inconel 625 exhibited a promising physical and structural properties & also studied the surface morphology of coated Inconel substrates by Atomic force microscopy(AFM) from this it should be noted that in some areas of materials, there were indications of the existence oflocalcrystallinestructures. Cracking is clearly evident at the surface

Salts pray corrosion, Inconelspecimen 600,625&718,NaCl, HCl, Surfaceroughness