Investigation of Wetting Properties and Long Term Stability of Fabricated Superhydrophobic Coating on Titanium by two Step Method

In this study two step method was used in order to fabricate superhydrophobic surface with high corrosion resistance and chemical stability on Ti substrate. At first shot peening treatment was applied on Ti surface and then etching operation was carried out on it. Finally, silane operation was done on Ti surface in order to reduce the surface energy. The effect of shot peening treatment on wettability, corrosion behavior and long term chemical stability of fabricated superhydrophobic surface was studied. The results indicated that, the network fiber structure is in nanometer scale which bonded with functional group of methyle tricolor silane on Ti substrate. Corrosion resistance of superhydrophobic surface was analyzed by immersion, potentiodynamic polarization and EIS test in ۳.۵%wt NaCl solution. Also long tern stability of fabricated coating was studied by immersion in ۳.۵%wt NaCl solution for different times. The results showed that the highest contact angle of ۱۵۹° was obtained for pre- shot peened samples. The corrosion resistance evaluation studies also indicate the high corrosion resistance of pre shot peened sample. Also the surface with high corrosion resistance indicate highest chemical stability and contact angle.

کلیدواژه ها:

Corrosion resistance ، superhydrophobic surface ، shot peening treatment ، long term stability ، EIS ، مقاومت به خوردگی ، پوشش فوق آبگریز ، شات پین کردن ، پایداری طولانی مدت ، طیف سنجی امپدانس الکتروشیمیایی