Laboratory stress corrosion cracking studies with sulfur acids and chlorides

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · Mater. Performance; (United States)

OSTI ID:6121006

Baylor, V B

Stress corrosion cracking (SCC) caused by polythionic acid and/or chlorides has occurred in coal liquefaction pilot plants. This problem is also common in refineries and has been extensively researched. This study examines: (1) the relationship of the ASTM standard ferric sulfate-sulfuric acid test for determining sensitization to resistance to polythionic SCC; (2) the cracking resistance of higher-alloy. Fe-Ni-Cr materials and common austenitic stainless steels (SS); and (3) the effect of chloride concentrations up to 1% in polythionic acid solutions on cracking behavior. The ferric sulfatesulfuric acid test can be used as an acceptance test for materials resistant to polythionic acid SCC. More highly alloyed materials were more resistant to sensitization than most austenitic SS and were virtually unattacked in polythionic acid solutions containing up to 1% chloride. Chloride increased the corrosion rate and caused localized pitting but it did not significantly affect the number of failures or the failure mode.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, TN
• OSTI ID: 6121006
• Journal Information: Mater. Performance; (United States), Vol. 24:10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
AUSTENITIC STEELS
DESTRUCTIVE TESTING
STRESS CORROSION
NICKEL-CHROMIUM STEELS
STAINLESS STEELS
CHEMICAL REACTORS
CHLORIDES
COAL LIQUEFACTION
CORROSION RESISTANCE
CRACKS
FAILURES
INORGANIC ACIDS
OXYGEN COMPOUNDS
PITTING CORROSION
SULFUR COMPOUNDS
SULFURIC ACID
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
LIQUEFACTION
MATERIALS TESTING
NICKEL ALLOYS
NICKEL STEELS
STEELS
TESTING
THERMOCHEMICAL PROCESSES
360105* - Metals & Alloys- Corrosion & Erosion
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction