Electrochemical Noise Analysis of the Corrosion of Titanium Alloys in NaCl and H2SO4 Solutions

Titanium alloys have been used in aerospace, aeronautic, automotive, biomedical, structural, and other applications because titanium less density than materials like steel support higher stress Al-alloys. However, components made of are exposed to corrosive environments, the most common being industrial marine atmospheres. This research shows corrosion behavior three alloys, specifically Ti-CP2, Ti-6Al-2Sn-4Zr-2Mo, Ti-6Al-4V with ?, near ? + ? phases. Alloys were two electrolytes a 3.5 wt. % H2SO4 NaCl solution at room temperature, their electrochemical was studied by noise technique (EN) according ASTM ASTM-G199 standard. EN signal filtered different methods, polynomial method employed obtain Rn, kurtosis, skew, potential spectral analysis (PSD). The wavelets used, from which energy dispersion plots obtained. last Hilbert–Huang Transform (HHT), where Hilbert Spectra analyzed. Results indicated that Rn compared PSD showed Ti-6Al-2Sn-4Zr-2Mo presented dissolution both electrolytes. Statistical methods passive layer created on Ti alloys’ surfaces is unstable; this condition notable for solution.