Register your product now - Radiometer Analytical

4.3.19 General corrosion (Rp)Automatic calculation of the polarisation resistance (Rp) is determined from cyclicvoltammetries performed around the rest potential. This Rp can be used to evaluatethe anti-corroding strength of an inhibitor. The polarisation resistance measures theinstantaneous corrosion rate occurring at the electrochemical interface.Consult the Help file, keyword indexes:General corrosion (Rp) - Method editing and General corrosion (Rp) -Measurements and curve files.4.3.20 Coupled corrosion (Evans)A current scan is applied to 2 working electrodes, the potential of each electrode ismeasured versus the imposed current. The method is stopped when anintercept has been obtained for the 2 voltammetric curves. The 2 voltammetriccurves, also called EVANS plot, are stored. Method not available if the HVB100 isconnected to a PGZ potentiostat.Consult the Help file, keyword indexes:Coupled corrosion (Evans) - Method editing and Coupled corrosion (Evans) -Measurements and curve files.4.3.21 Polarisation for corrosion (Tafel)The Polarisation for corrosion (Tafel) method is used to improve the signal to noiseratio of linear voltammetries at scan rates from 50 mV/sec down to 1 mV/min. Suchpolarisation curves can be processed under Tafel Analysis with confidence.Method available with VoltaLab 06, VoltaLab 10, VoltaLab 40, VoltaLab 50 andVoltaLab 80.Consult the Help file, keyword indexes:Polarisation for corrosion (Tafel) - Method editing and Polarisation forcorrosion (Tafel) - Measurements and curve files.52VoltaMaster 4 - Version 7.0xSection 4, Chapter 3: Methods available