Corrosion Potential Experimental Sequence
Run the Corrosion Potential standard technique by selecting Experiment, DC Corrosion, Corrosion Potential from the Framework™ menu bar. This initiates the following sequence of events:
Framework creates a Runner window, and the Corrosion Potential.exp script is run in this window.
- The script creates the Setup dialog box and accepts changes in the experimental parameters.
- The script now obtains the use of the potentiostat specified during Setup, and opens the data file using the Output name. If the potentiostat is in use or the file cannot be opened, the script returns you to the Setup dialog box.
The file header information is written to the data file. This header information includes:
- Tags identifying possible analyses
- The current time and date
- A list of the Setup parameters
- This information is written to the file prior to data-acquisition. If the experiment is aborted, the file contains only this information.
- The script conditions the electrode if Conditioning was specified in the Setup. Conditioning is done by applying a fixed potential for a defined time. It establishes a known surface state on the corrosion specimen. A plot of current versus time is displayed during the Conditioning.
- The cell is turned off and Eoc is repetitively measured. The time between measurements is determined by the Sample Period. Readings are taken for the time specified as Total Time in setup. After each point, the potential measurement range is automatically switched to the optimal range for the measured potential.
A plot of potential vs. time is displayed during the experiment.
- The data are written to the output file, and the script cleans up and halts.
When the scan is over, the cell is turned off. The acquired data are written to the output file.
- The script then waits for you to click the Skip button. When you do , the script closes everything that is open, including the Runner window.