1：Experimental Design and Method Selection:

The study used a model geometry with electrochemical cells to analyze key parameters (temperature, ionic species, pH evolution, applied potential, material conductivity/doping) controlling degradation mechanisms. Methods included long-term and temperature-accelerated immersion tests, electrochemical measurements (OCP, potentiodynamic and potentiostatic polarization), and pH measurements.

2：Sample Selection and Data Sources:

Boron-doped polished Si (p-type, 1–30 Ω·cm) wafer pieces with (100) crystal orientation were used. Experiments were performed in 0.01 M phosphate buffered saline (PBS) and HyClone Wear Test Fluid (WTF).

3：01 M phosphate buffered saline (PBS) and HyClone Wear Test Fluid (WTF). List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included a PGSTAT30 potentiostat (Metrohm-Autolab), Ag/AgCl reference electrode (Metrohm), platinum counter electrode (Metrohm), multichannel zero-resistance ammeter (ZRA GalvoGill 12, ACM Instruments), scanning electron microscope (SEM, Hitachi S-3700N), stylus profiler (DektakXT, Bruker), and polyoxymethylene (POM) clamping devices. Materials included Si wafers, PBS, WTF, pH indicators (phenolphthalein, thymolphthalein), and various salt solutions.

4：Experimental Procedures and Operational Workflow:

Immersion experiments involved clamping Si pieces to form confined/crevice cells and immersing in solutions at controlled temperatures. Electrochemical measurements included OCP and polarization in bulk and confined setups. pH was monitored using agar-infused indicators. Post-immersion, surfaces were characterized with SEM and profilometry.

5：Data Analysis Methods:

Corrosion rates were calculated from profilometer measurements. Activation energies were derived from Arrhenius plots. Electrochemical data were analyzed for potential and current evolution.