11. Origin Lab - Anodic & Cathodic slope (Tafel Slope)

[@AntonioGonzalez-od8xm]

Thanks for the support.

[@pshdarahmed2799]

Thanks for your clear explanations, hope you continue .

[@ShivaprakashGopinath]

bro i learn this tafel plot ecorr and icorr values about 100 videos, but in your video i understand the meaning... thanks bro....

[@taskncamurcu6544]

Your explanations helped me a lot. Thank you. Best regards

[@BrunaLobo]

Thank you!

[@lumajoshua8798]

Thank you for this explanation. Its very helpful.

[@worldofinformation815]

Thanks, Dear Doctor

[@dsa3334]

Thank you so much

[@gyaniyumnam7266]

Which origin version are you using for this one? In my case there is no app option.

[@ibrahimnazemqader9153]

Origin 2018

[@nileshpandey8032]

Your CV curve is not complete. It’s only taken for charging cycle. So can we take half cycle CV and still calculate Tafel slopes and exchange current density? Or is a complete CV cycle necessarily needed?

[@kubraozturk2829]

Thank you very much for the information.

[@kocharkhasro387]

Well done brother.

[@googlegoogle1610]

Hi, I would like to ask, is this the only way to get values for Ecorr and Icorr in originlab?? BTW: your researchgate link does not work

[@helpinghands5493]

Informative video

[@mahmudulhasan14]

How did you get your raw data file? I mean from which experiment you got it?

[@ibrahimnazemqader9153]

It is Tafel test

[@mahmudulhasan14]

@@ibrahimnazemqader9153 i see. Its not that you interpreted from CV

[@learnenglishvocabulary550]

How are ya, Ibrahim Nazem Qader. particularly really video. thanks. :)

[@miftakhurrohmah7589]

Sir, after you get these value, how you can calculate the corrosion rate based on this data?

[@ibrahimnazemqader9153]

I have an Excel file. Please give me your email, I will send the file

[@m.m.bb339]

استاذ ممكن اتواصل مع حضرتك احتاج بعض المساعده

[@aniqibnuajizan2146]

Thank you sir for the great video. Want to ask, in the raw table I is A/cm2, but in your final table it is microA/cm2? can you explain it? thank you sir.

[@ibrahimnazemqader9153]

Dear Aniq Ibnu Aljizan The number in origin is shown as 1.45643E-7, which means 1.45643*10^-7. You can convert it as 0.45643*10^-6 or 0.45643 µ

[@aniqibnuajizan2146]

@@ibrahimnazemqader9153 Thank you, sir! And in origin, the value for Ecorr is -0.158, and why do you write positive 0.158? As well as the slope value? Thank you for the help.

[@yousif1923]

Thanks for your information 🤩.

[@malihaparvin4224]

very useful, thank you

[@cesarj7783]

Excelent bro, thanks!!

[@yudisetiadi8116]

Thanks, 👍

[@rinkiaryaiitr5546]

Hello Sir! thanks a lot for this vedio. Could plz upload a video that how to plot Kotechy Levich data in origin

[@rosezroseful]

How to find ECSA and Cdl??

[@ibrahimnazemqader9153]

To find ECSA and Cdl in Tafel test experimental results, you typically need to perform additional measurements such as cyclic voltammetry (CV) and then use appropriate formulas. The ECSA can be calculated using the formula: ECSA=Q/(C⋅A) Where: Q is the charge associated with the hydrogen adsorption/desorption reaction, C is the specific capacitance of the electrode material, A is the surface area of the electrode. Cdl can be calculated using the formula: Cdl=(dQ/dE)/(2⋅π⋅v) Where: dQ/dE is the slope of the capacitive current peak in CV curve (measured in ampere/volt), v is the scan rate (measured in V/s).

[@rosezroseful]

Thank you so much for your reply...

[@rosezroseful]

Should I find dq/de from the CV graph?? Where to apply Ecorr and I corr values?? Thank you...

[@AnkitaSingh-go7cz]

What if I am getting equal slopes in both the peaks? Thank You.

[@ibrahimnazemqader9153]

Dear @Ankita Singh the following reference can help you: Kakaei, K., Esrafili, M. D., & Ehsani, A. (2019). Graphene and Anticorrosive Properties. In Interface science and technology (Vol. 27, pp. 303-337). Elsevier.

[@AnkitaSingh-go7cz]

@@ibrahimnazemqader9153 Thank you

[@AnilKumar-tp7eh]

@@ibrahimnazemqader9153 video was awesome sir it gave an easy way to obtain the tafel slopes. Actually I am confused to find out from LSV curves please do a video on that thank you

[@chijiokekennethakuata5903]

Tafel slope in Volts???

[@vinojayapal2884]

How to find Jo value in tafel plot sir

[@sivarao7126]

Sir, here tafel plot is good so you are able to draw the tangents that are meeting at a point. but in my tafel plot, I am unable to draw tangents. what to do. kindly respond.

[@mairisberzins8677]

Redo experiment. Try to eliminate sources of error. Check for limiting current (peaks in your I vs V graph). You want to use a region that is kinetically current limited not mass transport limited. Attempt faster/slower scan rate CVs to perhaps obtain larger potential range.

[@sivarao7126]

@@mairisberzins8677 thanq sir

[@princebaron4466]

الاخ ابراهيم ممكن اتواصل معك

[@ibrahimnazemqader9153]

[e-mail]

[@ilaygizemozbas3176]

Thank you so much for your helpful tutorial..Can you share your excel data if you are still have ?

[@ibrahimnazemqader9153]

Really, it was only for demonstration. I have deleted everything including Excel file. Sorry about that However, you can use my another video about digitizing any graph. You can find any related plot in literature and conver it to data. Also you can compare your results with that perticular reference.

[@bhavanarikhari4136]

Thank you for the very informative video. I would like to know can also find Lin Pol R (Ohm) via the origin lab?

[@ibrahimnazemqader9153]

Hi Bhavana Rikhari. I am sorry, can you please what is Lin Pol R?

[@reemmohamed8295]

Thanks for explanation but i think 1.4E-7 is log i corr not i corr

[@ibrahimnazemqader9153]

Thanks for your comment. Actually, it is the current not log (i). The x-axis is normally demonstrated in log form not normal form.

[@sarasamreen8178]

Can anyone tell me the equation for tafel slope

[@ibrahimnazemqader9153]

@sara samreen basically, slope can be found by dividing y-axis to x-axis. In the straight line, you have to choose two points, then determine their corresponding x and y values. However, in this case, you don't need to find slope manually. Please use Origin software to find the slopes.

[@khaledshebani8111]

Thank you for the information and explanation. Can you write your email or any means of communication? I need to communicate and talk to you

[@ibrahimnazemqader9153]

[e-mail]

[@drzainabmahdi6747]

ممكن التواصل مع حضرتك ؟

[@ibrahimnazemqader9153]

Yes you can :)