Page 499 - Corrosion Engineering Principles and Practice
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466 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 467
Slow strain rate
test (SSRT)
No No susceptibility
SCC ?
to SCC
Yes s = Threshold stress
th
Elastic a(t) = Crack length at time t
SSRT a = Crack propagation rate
a max = Maximum average crack propagation rate
No Dynamic plastic
SCC ?
straining tests
Slow strain rate test
a max
Dynamic DCB testing
Static tests a, K ISCC
Interrupted SSRT
C-ring test a(t)
s th
Dynamic crack tip
Double cantilever beam (DCB) displacement (CTOD)
a, K ISCC
NACE tensile test
s th
FIGURE 11.26 Decision tree for the selection of corrosion tests to verify the
susceptibility of steels to SCC.
organization that provides a forum for producers, users, ultimate
consumers, and those having a general interest to meet on common
ground and write standards for materials, products, systems, and
services. There are over 130 ASTM technical committees, and each
has the same basic three-tiered structure (i.e., main committee, sub-
committees, and task groups). Committee G01, Corrosion of Metals,
is thus subdivided into the following subcommittees:
• G01.02 Terminology
• G01.04 Atmospheric Corrosion
• G01.05 Laboratory Corrosion Tests
