What if sunlight and seawater could help clean up mining—but the salty water slowly eats the machine doing the work? This study finds that a titanium electrode can withstand that challenge better than expected. Climate change is pushing industrial processes toward lower-carbon options, and electrochemical processes can run on renewable electricity, especially solar power.

One widely used electrochemical process in industry is electroflotation, identified in the study as a prominent process for industrial applications. Titanium is stable and generates a protective oxide film when it meets natural environments, including salty water.

The study says titanium forms a protective passive oxide film when it contacts natural environments, including saline solutions such as seawater. The study also reports that seawater increases electrode corrosion, especially at the anodic electrode, where the applied high-potential material dissolves.

The corrosion procedure examined the separate electrical reactions taking place on titanium in salty water. The corrosion procedure examined the kinetics of partial electrochemical reactions on a titanium alloy electrode, using polarization curves measured in a freshly prepared electrolyte with a rotating disc electrode.

After solar electroflotation, the surface analysis showed changes on the titanium alloy surface. At the cathode, hydrogen bubbles formed while two reactions happened at the same time. The study says that the effect of dissolved ions on this process needs more study.

At the anode, the applied electrical pressure produced pits and cracks, while chloride ions attacked the surface and dissolved material. But new titanium-containing products formed a protective film over the anode surface.

The electrode surface is no longer smooth: it is covered with pits, cracks, and rough, newly formed deposits. That damage matters because it can change how oxygen bubbles form and how efficiently the electrode keeps working. The measured corrosion values were low and stayed unchanged, indicating a low corrosion rate for the titanium electrode in salty water.

That result matters because the electrode was exposed to the same kind of salty environment needed for solar electroflotation. The titanium anode resisted corrosion during operation with sunlight and artificial seawater, with minimal weight loss. That supports solar electroflotation as a possible lower-impact option for mineral processing and hydrogen production, especially in places with strong sunlight.

It also relies on a corrosion-resistant titanium anode operated with a direct photovoltaic system in artificial seawater, with minimal weight loss. The technology can significantly reduce environmental impact, while the generated HHO can support mining decarbonization as solar fuel for in-situ hydrogen recovery.

The study finds that titanium loses very little weight while producing bubbles in salty water powered by sunlight. That could make cleaner mineral processing and hydrogen production more practical in sunny, water-scarce regions.