The chloride stress-corrosion cracking behavior of stainless steels under different test methods
- Royal Inst. of Technology, Stockholm (Sweden). Dept. of Materials Science and Engineering
Chloride-induced stress-corrosion cracking (SCC) is one of the failure modes of stainless steels. Highly alloyed austenitic stainless steels S32654, S31254, and N08028, and duplex grades S32750 and S31803 possess much improved resistance to SCC compared with S30400 and S31600 steels. With the development of a database, SSData, experimental data collected from calcium chloride tests, autoclave tests, and drop evaporation tests were evaluated. Stress-corrosion cracking data generated by autoclave tests agreed well with the practical service conditions and can be used to discriminate alloys for SCC resistance in sodium chloride solution. Drop evaporation test data can be used in situations where evaporation may occur and cyclic loading may be involved. The SCC resistance of alloys under each method increased with increasing molybdenum equivalent Mo + 0.25Cr + 0.1Ni. For a given alloy, the testing result depends on the stress state and environment; different test methods can give different ranking orders concerning SCC resistance. The performance of duplex stainless steels in a chloride-containing environment at higher temperatures was not as good as expected when dynamic loading was involved.
- OSTI ID:
- 6608837
- Journal Information:
- Journal of Materials Engineering and Performance; (United States), Vol. 3:6; ISSN 1059-9495
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHLORIDES
CORROSIVE EFFECTS
STAINLESS STEELS
CRACK PROPAGATION
STRESS CORROSION
DATA ANALYSIS
MECHANICAL TESTS
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CORROSION
HALIDES
HALOGEN COMPOUNDS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
STEELS
TESTING
360103* - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion