By J. R. Davis
Offers functional discussions on thermodynamic and electrochemical ideas of corrosion, reputation and prevention of assorted kinds of corrosion, different types of corrosive environments ordinarily encountered. DLC: Corrosion and anti-corrosives.
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Basic Concepts Important to Corrosion 47 Relationships among some of the units commonly used for corrosion rates are given in Table 8. When to Use Metals and Alloys in Certain Corrosion Rates. As discussed in later chapters, different metals and alloys have varying corrosion rates depending, of course, on specific environments and environmental variables. Table 9 lists some general guidelines, which can serve as a starting point when trying to determine maximum corrosion rates for specific working conditions for cases of general (uniform) corrosion.
There is no means for the transfer of electrical charge from the anodes to the cathodes. A practical example of this form of corrosion control is the removal of the electrolyte in a corrosion cell. This can be done by completely drying the metal surface. If there is no moisture on the surface for the formation of an ionic current path, there is no aqueous corrosion. Similarly, elimination of the electronic path between the anode and cathode also eliminates corrosion. If we are dealing with galvanic corrosion, a corrosion reaction driven by two dissimilar metals, the galvanic corrosion can be eliminated by electrically isolating the two metals.
