Page 270 - Corrosion Engineering Principles and Practice
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244 C h a p t e r 7 C o r r o s i o n F a i l u r e s , F a c t o r s , a n d C e l l s 245
FIGURE 7.36 Advanced stage on the belly of a Boeing 737, where the
corrosion products have expanded to the point where a number of rivets
have actually popped their heads (Courtesy Mike Dahlager, Pacific Corrosion
Control Corp.).
–0.40 –0.65 –0.35
V V V
+ – + – + –
Ground
Old pipe New pipe Old pipe
Anodic area
Corrosion
FIGURE 7.37 Schematic showing a differential corrosion cell created by
replacement of a section of pipe.