Assistant Professor
Department of Chemical Engineering
National Institute of Technology Calicut, India
Performing Experiments
Anodic Dissolution of Tantalum (Ta) in Acidic fluoride media
-
For studying the anodic dissolution mechanism of valve metals in acidic fluoride media, Eletrochemical Impedance Spectroscopy (EIS) and Anodic Polarization experiments are employed.
-
Chronoamperometry is also performed at active-passive regions for XPS analysis.
Corrosion of Ta in acidic fluoride media
Corrosion of Tantalum in acidic fluoride media are studied by-
-
Conventional weight loss method (Immersion tests)
-
The corrosion current are measured from Tafel analysis of polarisation data
-
The polarisation resistance is measured from EIS, Linear Polarisation (LP) and Tafel analysis
Hydrogen Evolution Reaction (HER) on Platinum
-
Studies on the HER reactions are limited to low current density in normal RDE due to formation of gas bubbles on the electrode surface
​
-
Inverted Rotating Disc Electrodes (IRDE) is used to study the reaction mechanism of HER and the bubbles release fast from the surface of electrode.
Continuous Weight Loss Measurement
-
An analytical weighing balance (0.1 mg accuracy) with bottom hook is used to measure the continuous weight change (corrosion rate) of metal in acid​​.
​
-
The experimental set up is kept inside to eliminate the external noises and the weigh changes in the balance is recorded in an external PC by using WinCT data communication software.