Video1
Corrosion measurement- intro/techniques
Corrosion monitoring/inspection
Corrosion Rate
Specimen(coupon) preparation/orientation/site selection
Weight loss and corrosion rate determination example (Research paper)
Visual and microscopic observations
Surface analysis techniques
Video2
Surface analysis techniques contd.
o Optical microscope
o Scanning Electron microscopy
o Surface characterization example (Research paper)
o Rust analysis
Engineering failure analysis (Research paper)
Fracture position and morphologies
TEM- theory/specimen preparation
Corrosion measurement- Example (Chromium on wet dry acid corrosion behaviour of low
alloy steel)
Video3
Corrosion product analysis techniques-
o XRD
o FTIR
o Raman spectroscopy
o XPS
Theory of techniques and example
Research paper on Raman spectroscopy
Electrochemical technique for corrosion measurement
Polarization method for corrosion measurement
o Butler-Volmer Equation
Video4
Polarization method for corrosion measurement
o Linear polarization- Theory/ Butler-Volmer Equation/E vs I/Equilibrium and
corrosion potential
o Calculation of corrosion rate from corrosion current
Resistance measurement techniques-
o Linear polarization technique (Corrosion rate graph & numerical)
o Galvanostatic technique
OCP vs Time plot (open circuit potential) (DC based)
Video5
Electrochemical technique for corrosion measurement
o DC/AC based
Tafel extrapolation method (Linear relationship between E(potential) and Log I(current)
o Anodic Tafel slope/Cathodic Tafel slope/I(corrosion) (DC based)
o Examples(numerical)
Video6
Experimental polarization method (Laboratory methods) (DC based)
Limitations of corrosion methods (In determining the corrosion rate)
o Solution resistance
o Scan Rate
o Electrode bridging
o Presence of oxidation-reduction species
o Variation of corrosion potential
o Diffusion-controlled condition
o General corrosion
AC based-
o Electrochemical impedance spectroscopy (EIS)
o Corrosion cell R-L-C circuits
o AC impedance plots
o Nyquist plots (example)
o Bode plots
Video7
Electrical Resistance techniques (detecting and measuring resistance)
o Method
o Sensing Probe design
Sensor development-
o Concept/ relation of thickness with potential
o Arranged in Wheatstone bridge
o Corrosion Rates
Non-destructive technologies
o Visual/Liquid penetrant/magnetic particle/radiographic inspection (x-ray and
gamma ray)/electromagnetic/ultrasonic inspections- Process given in detail
o Domains in NDE (parameters/performance)
o Results dependence on various parameters
Corrosion in various medium
Corrosion by sulphur bearing medium
o Process of sulphidation
o Mechanism of sulphur corrosion and failure
Corrosion in acid medium
o Theory and examples
Corrosion in concrete
o Carbonation mechanism
o Chloride attack
o Stress corrosion cracking
Corrosion in soil
o Example/parameters
o Monitoring- Soil corrosion probes (SCP)
o Electrical Resistance probes
o Flat surface probes
o Ring type probes
Corrosion measurement 4
1. Corrosion monitoring
2. Corrosion inspection
3. Change in Size, Volume, Mass
4. Various Techniques
5. Corrosion Rate
6. Corrosion rate: Example- Two Soil Environment
7. Surface analysis
8. Techniques
9. Surface characterisation with -
a. Optical microscope
b. SEM
c. TEM
10. Examples
11. Fracture position and morphology
12. Corrosion pit interior
13. Specimen preparation
14. Product analysis
15. XRD
16. FTIR
17. Raman Spectroscopy
18. XPS
19. Electrochemical Corrosion measurement
20. Dc current
21. Ac current
22. Linear Polarisation
23. Polarisation resistance
24. Corrosion rate
25. Resistance measurement technique
26. Linear polarisation technique
27. Galvanostatic technique
28. Numericals
29. Corrosion potential measurement
30. Tafel extrapolation
31. Example
32. Laboratory method
33. General limitations of polarisation methods
34. Electrochemical impedance spectroscopy
35. Corrosion cell
a. Resistance
b. Capacitor
c. Inductor
d. RLC
36. Nyquist Plot
37. Bode Plot
Protection Methods
1. Metallic Coating
2. It’s applications
a. Electroplated
b. Electroless
c. Hot dip
d. Thermal spraying
e. Cladding
f. Vapour deposited coatings
g. Ion implantation and laser processing
3. Inorganic Coatings
a. Vitreous Enamels
b. Portland cement coatings
c. Chemical conversion coatings
4. Organic Coatings
a. Resins
i. Vinyl
ii. Acrylics
iii. Alkyd
iv. Modified alkyd
v. Chlorinated rubber
vi. Epoxy resins
vii. Urethane resins
viii. Polyester resins
b. Pigments
i. 3 types
c. Solvents, Additives and Fillers
5. Paint for corrosion protection
6. Metal Surface Preparation
7. Corrosion Inhibitors
8. Inhibition mechanism
a. Anodic passivating inhibitor
b. Cathodic precipitation inhibitors
c. Mixed precipitation inhibitors
d. Acidic environment inhibitors
e. Alkaline environment inhibitors
f. Neutral Solution Environment Inhibitors
g. Based on mode of protection
i. Chemical Passivators
ii. Adsorption inhibitors
iii. Film forming inhibitors
iv. Vapor phase inhibitors
9. Cathodic Protection
10. Sacrificial Anode and Impressed Current Cathodic Protection
a. Advantage
b. Limitations
