Laboratory stress corrosion cracking studies with sulfur acids and chlorides

Journal Article · Tue Oct 01 04:00:00 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), Journal Name: Mater. Performance; (United States) Vol. 24:10; ISSN MTPFB
• Country of Publication: United States
• Language: English

Related Subjects

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