Page 505 - Corrosion Engineering Principles and Practice

472 C h a p t e r 1 1 M a t e r i a l s S e l e c t i o n , Te s t i n g , a n d D e s i g n C o n s i d e r a t i o n s 473

Salf fog

Salt solution
reservoir

FIGURE 11.33 Controlled salt fog test chamber during a humid cycle.

range of chamber designs and sizes including walk-in or even garage-
size rooms (Fig. 11.35) that are capable of performing this test.
In spite of serious shortcomings in providing guidance for service-
life prediction, the continuous salt-spray test, which was originally
designed to test coatings on metals, has been widely used to evaluate
the resistance of metals to corrosion in marine service or on exposed
shore locations [25;26]. Extensive experience has shown that, although
salt-spray tests yield results somewhat similar to those in marine

FIGURE 11.34 Controlled salt fog test chamber during a dry cycle.