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Scanning Reference Electrode technique |
| Description:
Scanning reference electrode technique (SRET) is an in situ technique used to study the electrochemical process during localized corrosion without interrupting the process taking place. Within the electrolyte directly above a localized electrochemical active site, there exist an electromagnetic field. A probe consisted of two platinum wires can sense the potential difference between two different places where the two platinum wires are located. This potential difference then is processed by a differential amplifier. By scanning the SRET probe over the surface of the test material immersed in an electrolyte, these fields may be mapped out as a function of x and y or monitored with respect to time. Resulting data can be instantly display, stored and manipulated in a number of formats including individual linescans, area maps and sequential time related images. The potential field distribution over the surface of the electrochemically active site is representative of the localized current flow. By using a calibration procedure the SRET can also be used to make discrete current measurements.
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| Technical details: | ||
| Maximum specimen size | 350 x 200 x 30 mm | |
| Probe movement | x = 100 mm y = 100 mm z = 35 mm |
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| Scan speed | 1 - 25 mm/sec | |
| Stepper motor resolution (steps per 360° revolution) | 1000 | |
| Maximum probe step resolution | 0.5 µm | |
| Amplifier characteristics | ||
| Input coupling Gain | DC and
AC 1x - 5000x (optional hi-gain headamp) |
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| Electrolyte tank capacity | 4.5 litres | |
| Computer | ||
| Type Harddisk Floppy's CD-writer Printer | 486DX2, 66MHz 80 Mb 3.5 inch 1.44 Mb 230 Mb HP Deskjet 560C colour printer |
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| Software | ||
| Operating system Image display Data point resolution Colour palette | Microsoft windows Super VGA (800x600x32k colours variable from 8x6 to 512x384 16,777,216 |
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| Room: 01.19 |
| More Technical information: Techinfo@mtm.kuleuven.be |
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Copyright ©1999, Katholieke Universiteit Leuven Information provider: K.U.Leuven, Department MTM Page maintenance: Webmaster Comments on the contents: Webmaster Last modified: January, the 18th, 2002 |
