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Corrosion in Aqueous Solutions and Corrosion in Gases at Elevated Temperatures – analogies and disparities

✍ Scribed by Carl Wagner

Publisher
John Wiley and Sons
Year
1974
Tongue
German
Weight
555 KB
Volume
25
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

On the basis of some examples of corrosion in the two media mentioned above the author shows that electrochemical mechanisms of corrosion can be postulated with aqueous solutions as well as with hot gases and salt melts. In quite a number of corrosions the action of local cells comes to bear. On the basis of these data it is possible to define analogies between high temperature oxidation and passivation in solutions. Disparities exist, however, with respect to the kinetics of these processes because the rate can be controlled by very different reactions. Analogies are equally found in the case of inhibition where certain inorganic substances act as inhibitors even at rather high temperatures. The analogies and disparities considered here, are not restricted to pure metals but are equally applicable to alloys where it is possible to find analogies e.g. in the case of the scaling and acid resistance of alloyed steels.

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