Hello all, I am using a nano-indention device (JKR) to check adhesion capability of polymer gel under electric condition. I place two electrode on top of my sample. one electrode is indention stem itself another one is just a wire. both electrode material is Titanium. While I apply electricity; at the interface of sample and electrode, I put 100 ul Nacl buffer (ph 3). the applied voltage range is from 1 to 25 volt. and the current range is uA to 180 mA depends on my set up. My question is - I have found some literature is saying that for Ti as anode 10 V is the good one, as beyond that it generates TiCl4 and pitting. well for my goal the TiCl4 is bad. So I tried to keep my voltage below 10V (wire negative and indention positive) but still the result is same as what I got beyond 10V application. I am thinking may be whatever the voltage I always get TiCl4. Even I tried changing the polarity of those two electrode (to use the size mismatch as a factor - wire electrode as anode will generate very little TiCl4) but still no expected result.

So please correct me if I am thinking wrong about the TiCl4 generation, below or beyond 10V application.