Anodizing

Mathematics education

Engineering

Electrochemical machining

Electrochemistry

Metallurgy

Materials science

Layer (electronics)

Inconel

Chemical engineering

Porosity

Dissolution

Physical chemistry

Alloy

Mathematics

Composite material

Microscale chemistry

Corrosion

Chemistry

Machining

Electrode

Anode

Aluminium

Electrolyte

Passivation

Corrosion Science

The mechanism by which electrolytic products are removed during ECM of Inconel 718 in a C6H5K3O7 electrolyte was clarified. Experimental results revealed that Cit3− ions decrease the amounts of flocculent and insoluble products in the machining region considerably. The resulting passivating film presented a looser, more porous structure than that from a NaNO3 solution. This made the Inconel 718 more prone to electrochemical corrosion. The uniformity and microscale nature of the micro-pit structure dispersed on the machined surface improved substantially as the current density increased. This improved the surface quality dramatically. Finally, the anodic dissolution characteristic models were established.

Anodic dissolution characteristics of Inconel 718 in C6H5K3O7 and NaNO3 solutions by pulse electrochemical machining