The critical state of water combined with mantle heat and hydraulic pressure should allow water to be continuous from the surface into the mantle. The concentration gradient between the mantle and core should cause the upper mantle's plasma water to diffuse from the upper mantle toward the iron/nickel core dissolving it. If so, shouldn't the ocean levels have dropped over the past several billion years? Or if the ocean levels have not dropped, does this imply that an iron core can not exist? The ocean level change should be significant seeing the core is about 1000 times more massive than the oceans.

I pose these questions because seismic data indicates fluid and solid state within the interior of the earth, therefore the interior of the earth should have some type of chemical/plasma hybrid set of potentials, such that the chemcial potential properties of surface fluid and solids should at least partially be in effect. I'm pretty sure water plasma will corrode iron or nickel on the surface, why not more so at higher temp and pressure?

While I am FAR from my field here, I would prefer to question your transport mechanics before I questioned the core composition. I have not seen any evidence presented for the large scale infusion of "plasma water" into the upper mantle of the earth. Maybe this is something I missed ... as I say, this is far from my field.

My first guess would be that some mechanism, probably a brute force mechanism, prevents this infusion you propose from taking place at all, and sequesters the earth's surface water pretty much where it is and where it apparently has been for a relatively long geological time.

Perhaps someone with greater expertise in geophysics can rescue this discussion and comment on the question of the "plasma water" infusion theory.

I did research growing gem quality crystals. Hydrothermal water or critical water in the presence of small ions makes minerals very soluble, even at lab pressures and temperatures. Smaller amounts of critical water in high pressure molten fluxes of minerials, i.e., magma, lowers their dissolving temp. There is no problem for water reaching the mantle due to the hydraulic pressure and mantle heat. Once in the mantle, the mantle heat will cause the water to dissociate into plasma water composed of protons, electrons and ioniized oxygen.

The infusion from there isn't a problem. The mantle already has plenty of oxygen, so that the only thing that needs to diffuse from the upper mantle is the hydrogen protons. The lower mantle's oxygen and the surface hydrogen meet and make plasma water near the core. As this oxygen and hydrogen gets tied up by corrosion, at the liquid-solid core interface, more surface water can be pulled in by osmosis for further hydrogen diffusion.

The three possible explanations for the oceans levels not dropping are: one the mantle obeys different laws of chemistry and physics, two, the core is a super corrosion resistant alloy that makes the diffusion of hydrogen reach a steady state (adding nickel helped but molybdenum would have been better), or three, an iron core doesn't exist.

Only the last two are reasonable. The logic that gets rid of the super alloy theory is that the chemical/plasma potential within the early earth, i.e., plasma hydrogen and oxygen were everywhere before the phase separation of the core. This would have never allowed phase separation of a metallic core to begin with or there should be no surface water. The iron core got there due to human intervention.

The original assumption was phase separation due to calculated abundance and simple densities differences within an inert mantle. Iron was also a convenient way to explain the earth's magnetic field all in one theory. But now the magnetic field theory has problems due to the cyclic inversion of the earth's this magnetic field requiring something like a bulk fluid iron circulation inversion, even with the core spinning faster than the mantle.

I'm sentimental too, but my duty as a scientist is logic and common sense before sentiment. A better alternative exists.