Fundamental Aspects of Corrosion Films in Corrosion Science

Front Cover
Springer Science & Business Media, Jan 31, 1991 - Science - 192 pages
The purpose of this book is to stimulate thinking among corrosion scientists and engineers to examine corrosion mechanisms and corro sion control from another perspective. While the presence of corro sion films in electrochemical corrosion has been recognized for over a century, the contribution of these films to all facets of corrosion has not been explored to a significant degree. Rather the role of films in certain mechanisms (i.e., stress corrosion cracking) has been empha sized, yet almost ignored for other corrosion mechanisms. This is viewed by the author as solely attributable to the lack of investigation into, and an understanding of, the contribution of films to these mech anisms or forms of attack. The lack of emphasis and study of corrosion films and their contribution to all forms of corrosion attack are probably the result of current university instruction that utilizes two popular corrosion texts (Uhlig and Fontana and Greene) for teaching. These texts provide an excellent understanding at the undergraduate level of corrosion funda mentals; however, the major implicit premise in these texts is that bulk properties of an alloy or metal control the corrosion resistance in a particular environment. For many applications and for a simple under standing of corrosion mechanics, this approach is sufficient. Yet, research on corrosion films indicate these films often have an entirely different composition than the bulk metal (ratio of alloying elements).
 

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Contents

Thermodynamics of Corrosion
1
Electrochemical Reactions
5
HighTemperature Aspects
19
References
23
Kinetics of Corrosion
25
Polarization
27
Passivation
35
HighTemperature Oxidation
40
References
85
Corrosion Inhibition and the Role of Films
87
References
106
Films and Pitting Corrosion
107
Pit Growth
117
Repassivation
122
References
124
Role of Films in Stress Corrosion Cracking and Hydrogen Embrittlement
127

References
44
Properties of Corrosion Films
45
Interface Reactions
46
Interphase Development
49
Defects in Crystalline Solids
51
Duplex and Multiphase Corrosion Films
68
Deviation of Films From Semiconductor Behavior
71
Discontinuous and Polycrystalline Films
73
Breakaway Oxidation
76
Film Stresses and Decohesion
77
Instability of Films
80
Current Theories of SCC
131
Film Rupture Model of SCC
136
Evidence of Films in SCC
137
Promotion and Inhibition of Hydrogen Damage by Films
151
The Use of Films to Reduce SCC and HD
157
References
160
Role of Films in ErosionCorrosion
163
Properties of the Film and Its Relation to ErosionCorrosion Resistance
170
References
187
Index
189
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