*3.5. Analysis of Acid-Neutralizing Ability*

Figure 6 shows the time-dependent changes in the pH of the solutions as an indication of the acid-neutralizing ability. Immersion of BG-coated specimens in acetic acid solution caused an increase in the pH, and the acid-neutralizing ability increased with increasing output voltage.

**Figure 6.** Time-dependent changes in the pH of the solutions as an indication of acid neutralizing ability.
