File Exchange > DataHandling >    Tafel Extrapolation

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Tafel Extr...on.opx
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Estimate Tafel Extrapolation using tangent lines on a data plot.

Screen Shot and Video:

This app can be used to estimate the Tafel Extrapolation, and output the corresponding values (e.g. anodic/cathodic curve function, corrosion potential and current, anodic/cathodic curve's slope and angle).

Download the file "Tafel Extrapolation.opx". Then drag-and-drop the file onto the Origin workspace.


  1. With a graph window active, select the "Tafel Extrapolation" app icon from the Apps panel. A dialog will open. The dialog provides options for the app gadget.
  2. Click the Help button in the top right corner of the dialog to open the help file. The file includes an explanation of dialog box settings, plus an example.


v1.1: fixed failed to open issue in Origin 2018
v1.2: support for Icorr,a and Icorr,c

Reviews and Comments:
04/24/2019OriginLabHi ferdinando, could you send the data to our technical service? And then we can see what help to do for you with your data.

04/19/! I ploted my linear polarization but whwn I want to use Tafel Extrapolation not show linear line but curves.

03/25/2019iCalculatevery useful !!!!!!

12/23/201800114899can't download

11/28/2018Mory6753it seems useful. i should test it for more data and graphs. thank you origin

10/16/2018OriginLabHi miftachulnurafifah, in this app, the x axis is linear, but the x data is logarithmic data, here show Icorr in Nonlogarithmic Form is to show the Icorr as exp(Icorr).

10/14/2018miftachulnurafifahwhy I cannot use Icorr in nonlogarithmic form?

08/29/2018OriginLabHi Ksenchy, thank you for your comments, we will look into updating the App.

08/29/2018KsenchySince the link for contacting directly the person who submitted the file exchange item doesn't works, here is one more suggestion - could you make a direct conversion and value of the Icorr in nonlogarithmic form? It would be great to have Tafel analysis in Origin, thanks for starting this app.

08/29/2018KsenchyThanks for this app, it is very useful. Would be possible to add some features, like to put the line through Ecorr back to tangent in order to calculate Icorr, a and Icoor, c ? Also, very useful would be possibility to see how good is the fitting of the curves, i.e. tangent in chossen area.