Stress-Corrosion Cracking of Titanium Alloys

Abstract

Cathodic Polarization Curve at a Scan Rate of 600 mV/hr 72 VI LIST OF FIGURES (Cont'd.) Figure Page 16 Cathodic Polarization Curve at a Scan Rate of 600 mV/hr with an Aerated Solution 7_ _T7 _ Cathodic Polarization Curve at a Scan Rate of 1500 mV/hr Snowing~~th~e" "Current-Increas e-Duri-ng a Back Scan Cathodic Polarization Curve Using a Platinum Counter Electrode 19 Current versus Time Behavior for Specimens held at -850 mV (SCE) 20 Scanning Electron Micrograph of the Surface Appearance of the Unpassivated Wire which Produced the Upper Curve of Figure 19; Strained at 10^/min. 2000X . 21 Scanning Electron Micrograph of the Surface Appearance of the Passivated Wire which Produced the Lower Curve of Figure 19; Strained at 10^/min. 2000X 22 Scanning Electron Micrograph of Fracture Surface of the Unpassivated Wire which produced the Upper Curve of Figure 19; Strained at 10^/min. 100X 87 23 Load versus Elongation Curve for a Specimen Fractured in Air at a Strain Rate of 10^/min. 90 2k Load versus Elongation Curve for a Specimen Fractured in Solution with an Applied Anodic Potential; Strained at 10f 0 /min. 91 25 Load versus Elongation Curve for a Specimen held at -1000 mV(SCE) for one-half hour then Strained at 10/ 0 /min. 26 Current Response to Straining at a Potential of +200 mV (SCE) at a Strain Rate of 10/ 0 /min. 92 7 Schematic Representation of the Change in Current During Straining. 28 Current Response to Straining at a Potential of -200 mV (SCE) at a Strain Rate of 10f 0 /min.

Corrosion of Titanium Electrode Used for Solar Saline Electroflotation

“…The use of noble metals such as Pt reduces the opportunity to industrialize disruptive technologies due to their high cost. The use of Ti as an electrode helps reduce the manufacturing costs of this type of electrochemical device [53] but is a propensity to suffer crevice corrosion and stress corrosion cracking (SCC) [54,55]. The crevice corrosion is divided into three steps: Initiation, propagation, and re-passivation.…”