CHEM02200704003 Nilamadhab Pandhy - Homi Bhabha National ...

5.2.9 Surface morphology analysis after potentiodynamic
polarization…………………………………………………….. 113
6 C H A P T E R 6 116
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6.1 Introduction…………………………………………………………….. 116
6.2 Results and discussion………………………………………………….. 119
6.2.1 Corrosion behaviour of Ti coated 304L SS in nitric acid
medium…………………………………………………………. 119
6.2.1.1 Phase and morphology characterization………………. 119
6.2.1.2 Open circuit potential vs. time measurement…………. 120
6.2.1.3 Electrochemical impedance analysis............................. 123
6.2.1.4 Potentiodynamic polarization study………………….. 127
6.2.1.5 Morphological investigation after potentiodynamic
polarization study……………………………………. 129
6.2.2 Corrosion behaviour of TiO 2 coated 304L SS in nitric acid
medium……………………………………………..................... 131
6.2.2.1 Phase and morphology characterization………………... 131
6.2.2.2 Open circuit potential vs. time measurement…………... 133
6.2.2.3 Electrochemical impedance analysis………………….... 135
6.2.2.4 Potentiodynamic polarization study……………………. 139
6.2.2.5 Morphological investigation after potentiodynamic
polarization study……………………………………… 143
6.2.3 Corrosion behaviour of duplex Ti-TiO 2 coated 304L SS in
nitric acid medium……………………………………................ 144
6.2.3.1 Phase and morphology characterization..................... 144
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