Yasser Abdelrhman

14 Questions 39 Answers 0 Followers

Questions related from Yasser Abdelrhman

How to solve the problem of invalid data when I use Zsim electrochemistry software?

I use Zsim software to fit and analyze my EIS-obtained results. I follow the following procedure: Step 1: I make another copy "save as" of the two columns Excel file of Z' and Z'' to *.txt...

28 April 2024 4,448 3 View

How to remove the (oxide) layer which covers the formed TiO2 nanotubes?

I have a problem with the oxide layer which covers the formed nanotubes, and I do not know what is wrong in my experimental procedure and how can I remove this annoyed layer? (please see the...

12 February 2016 9,215 5 View

After the aging heat treatment at 400 C for a Ti-alloy with high content of beta stabilizer elements, I can not detect w phase, and I do not know why?

Arc melted Ti-alloy consists high content of Mo and Fe alloying elements, was subjected to solution treatment at 900 c, followed by ice water quenched then followed by an aging treatment for 3 hrs...

27 January 2016 7,803 2 View

What is the easiest method to characterize the TiO2 nanotubes array cross section?

Self-organized TiO2 nanotubes on the surface of Ti is a new trend in the field of biomaterials, and there are many publications in this regards. But most articles do not give more details about...

10 December 2015 7,100 9 View

In titanium alloys: Can I distinguish between alpha, alpha' and alpha'' through XRD patterns ONLY without studying the microstructure?

If I have titanium-based alloy subjected to different thermal treatments, Is there any database (such as Tables or ...) illustrates: [the (2 theta) versus the peaks] and the specific type of the...

25 June 2015 1,742 6 View

Can I use Ag as counter electrode instead of Pt. in the anodization process of titanium alloys?

I have an alloy from titanium and I want to use the Ag as a counter electrode because the unavailability of Pt electrode in my Lab. Maybe I use these electrolytes: (0.15M NH4F + H2SO4) OR (1M...

02 April 2015 4,772 5 View

How can I deal with the high percentage error of Impedance resistance (Rb or Rct) using Zview software?

I am using Zview software to analyzed my impedance data, and after I select the suitable equivalent circuit and obtaining a good fitting (please see both Nyquist and Bode plots, attached files) I...

07 January 2015 2,839 13 View

Is there a relationship between the Potentiodynamic corrosion current and the charge transfer resistance from Impedance?

I have an alloy subjected to various heat treatment, Ti-15Mo-5Fe-5Zr , and I performed both the potentiodynamic polarization and the impedance test in Ringer's solution, but the obtained Icorr and...

21 December 2014 1,345 16 View

What is the physical meaning for the following equivalent circuits?

Two layers are supposed to form on the surface of the metal (untitled 3), The impedance data (untitled2) can be fitted by using any of the attached equivalent circuits (untitled & untitled1) I...

30 November 2014 7,039 15 View

How can I find the equivalent circuit from EIS data that is in a text file form?

I have EIS data as text file. Could anyone tell me how I can create a "Z extension file" to load it in ZsimWin software to find the equivalent circuit? Or whether there is any other way to enable...

23 October 2014 10,014 4 View

What is the difference between corrosion current and corrosion potential?

I have a titanium alloy specimen with composition Ti-5Mo-5Fe, and after performed the potentiodynamic corrosion test I obtained Icorr & Ecorr and by comparing these results with the Ti-6Al-4V...

17 July 2014 3,629 8 View

How can I determine the amount of released ions from a metal that is immersed in solution?

I am working on the corrosion of titanium alloys especially "Potentiodynamic test"- in Ringer's Solution. My alloy composition is Ti-6Al-4V, and I want to determine the number of released ions -in...

14 July 2014 8,047 4 View

Does epoxy mounting show any peaks in XRD examination?

I have very small Ti specimens, and I want to use epoxy mounting directly in the chamber of XRD, but I am afraid that this addition of material will affect the output XRD peaks. May I first...

07 June 2014 8,980 4 View

Is it necessary to perform the Open Circuit test before the potentiodynamic test in investigating the passivation of the titanium alloys and why?

What is the role of the open circuit test on the potentiodynamic corrosion test?

01 June 2014 216 9 View