Electrodes, resin-coated, adsorption

Early experiments were concerned with the protection against water-vapor adsorption afforded a pair of soft steel electrodes by coating each with FEP Teflon resin. The two coated electrodes were cleaned as before, mounted in the gas cell, and then discharged with gaseous ions while the metal pins were grounded. The resulting contact potential difference was zero. The same result was obtained using a pair of resin-coated aluminum electrodes. 

A bare platinum electrode was cleaned as previously described and then allowed to come to adsorption equilibrium with air in the gas chamber. When dry nitrogen was passed through the chamber, the potential difference between the platinum surface and the FEP resin-coated electrode increased rapidly, reaching an equilibrium value 0.5 volt higher in approximately 2 hours. Dry oxygen was then introduced into the chamber and the surface potential of the platinum decreased to a steady-state value of + 0.2 volt relative to the reference electrode (see Figure 6). This system was allowed to remain in that condition for 24 hours, during which time there was only a 20-mv. increase in the contact... 

Saturable dye absorber, 14 677 Saturated aqueous salt solution, 9 34 Saturated calomel electrode (SCE), 9 571 Saturated fatty acids, 10 829, 830 Saturated hydrocarbons adsorbent affinity, 1 674 adsorption by zeolites, 1 624 fluorine reactivity with, 11 831 isomerization of, 12 172—173 Saturated polyester resins, based on trimethylpentanediol, 12 673 Saturated polyesters, 10 7 Saturated synthetic rubber, 10 705 Saturation and coating processes, 10 12-13 Saturation bonding, 17 509-510 Saturation color, 19 262 Saturation concentration, 15 677 Saturation index... 

---