Environmental Degradation of Materials

Course Description

The course will begin with emphasis on the importance of studying environmental degradation of materials. Fundamentals of environmental degradation of materials will be addressed beginning with thermodynamics and kinetics of electrochemical phenomena. Different forms of corrosion related to materials, environment and stress will be familiarized. Corrosion occurring in major environments will be treated. Experimental methods to assess and predict the rate of corrosion will be introduced. Fundamentals of high temperature oxidation of metals will be treated. This will be followed by principles and methodology of corrosion control. Degradation of various material classes such as polymers, composites and electronic materials will be discussed. In the end, future outlook in this important field of engineering will be presented.

Environmental Degradation of Materials
Lecture 28: Intergranular corrosion, Dealloying
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Video Lectures & Study Materials

Visit the official course website for more study materials: http://nptel.ac.in/syllabus/113104061/

# Lecture Play Lecture
1 Introduction, Basic definition of corrosion (56:59) Play Video
2 Forms of Degradation, Thermodynamics of corrosion (1:00:43) Play Video
3 Thermodynamics of corrosion (35:12) Play Video
4 Thermodynamics of corrosion (54:32) Play Video
5 Thermodynamics of corrosion, Electrochemical series, Concentration cell (55:38) Play Video
6 Reduction Potential series, Pourbaix diagram (54:20) Play Video
7 Pourbaix diagram (59:15) Play Video
8 Pourbaix diagram (55:14) Play Video
9 Pourbaix diagram, Kinetics of corrosion (49:39) Play Video
10 Kinetics of corrosion, Rate expression, Solved problems (54:41) Play Video
11 Solved problems on the corrosion rate, Exchange current density (55:37) Play Video
12 Exchange current density, Polarization, Activation Polarization, Tafel Equation (55:07) Play Video
13 Activation Polarization, Concentration Polarization (56:34) Play Video
14 Concentration Polarization, Mixed Potential Theory (51:45) Play Video
15 Mixed Potential Theory, Explanation of corrosion events on the basis (50:47) Play Video
16 Explanation of corrosion events on the basis of Mixed potential theory (51:29) Play Video
17 Explanation of corrosion events on the basis of Mixed potential theory (54:04) Play Video
18 Passivation and Mixed potential theory (52:20) Play Video
19 Passivation and Mixed potential theory (51:59) Play Video
20 Different corrosion protection mechanisms, electrochemical ways (55:32) Play Video
21 Cathodic and anodic protection (54:06) Play Video
22 Anodic protection, Forms of corrosion, Factors of corrosion (1:13:10) Play Video
23 Forms of corrosion, Uniform Corrosion, Galvanic corrosion (50:40) Play Video
24 Galvanic corrosion (36:20) Play Video
25 Crevice corrosion (18:03) Play Video
26 Crevice corrosion, Pitting corrosion (52:19) Play Video
27 Pitting corrosion, Intergranular corrosion (54:53) Play Video
28 Intergranular corrosion, Dealloying (59:41) Play Video
29 Dealloying, Erosion corrosion (54:52) Play Video
30 Erosion corrosion, Cavitation (55:49) Play Video
31 Cavitation, Fretting corrosion, corrosion cracking (54:39) Play Video
32 Stress corrosion cracking: mechanisms(dissolution controlled) (51:29) Play Video
33 Stress corrosion cracking: mechanisms(cleavage controlled), factors affecting SCC, (55:46) Play Video
34 Biologically influenced corrosion, liquid metal attack (1:01:19) Play Video
35 Corrosion protection, change of materials, effect of design of component (53:19) Play Video
36 Corrosion protection, change of environment, Inhibitors, coatings (1:03:42) Play Video
37 Oxidation and hot corrosion, pitting Bedworth ratio, thermodynamics of oxidation (56:17) Play Video
38 Thermodynamics of oxidation, Ellingham diagram, oxidation kinetics and laws (48:42) Play Video
39 Oxide structure and Oxidation (59:00) Play Video
40 Hot corrosion, corrosion testing and failure analysis, linear polarization (1:19:48) Play Video
41 Degradation of composites, polymers and ceramics, corrosion and society (54:18) Play Video


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