Influences of H2SO4 and NaCl Concentrations on Stress Corrosion Cracking of AISI 304 Stainless Steel

2014 ◽  
Vol 893 ◽  
pp. 410-414 ◽  
Author(s):  
Nur Azhani Abd Razak ◽  
Yuli Panca Asmara ◽  
Mohamad Khairuazlan Kamaruzaman
Keyword(s):  
Stainless Steel ◽  
Aqueous Solutions ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
304 Stainless Steel ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Nacl Concentration ◽  
Corrosion Mode

This paper presents the influence of H2SO4and NaCl concentrations on the corrosion mode of AISI 304 stainless steel in H2SO4-NaCl aqueous solutions. Immersion test was conducted at room temperature using U-bend specimens. The specimens in annealed and sensitized conditions were immersed in aqueous solutions containing H2SO4concentration in the range of 0 to 3.0 kmol/m3with 1.5 kmol/m3interval, and NaCl concentration in the range of 0.5 to 2.0 kmol/m3with 0.5 kmol/m3interval. Results showed that, specimens in sensitized condition have a higher mass loss and higher corrosion rate. In addition, the experimental result also indicates that the two solutes have synergistic effect on corrosion mode of the material that is stress corrosion cracking (SCC) and general corrosion, which occur within a specific range of concentration. SCC region became smaller as the H2SO4and NaCl concentration increased. However, the occurrence of SCC was high when sensitization treatment was subjected to the specimens. The appearance of surface damage and crack morphology were revealed by using scanning electron microscopy (SEM).

Stress Corrosion Cracking of Sensitized AISI 304 Stainless Steel in High-Temperature Sodium Sulfate Solutions

CORROSION ◽  
1986 ◽  
Vol 42 (9) ◽  
pp. 559-564 ◽  
Author(s):  
K. Tanno ◽  
S. Ishizuka ◽  
S. Higuchi ◽  
N. Ohnaka
Keyword(s):  
Stainless Steel ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
304 Stainless Steel ◽  
Potential Range ◽  
Aisi 304 Stainless Steel ◽  
Intergranular Stress Corrosion ◽  
Aisi 304 ◽  
Wide Range

Abstract The susceptibility of sensitized AISI 304 stainless steel (SS) to intergranular stress corrosion cracking (IGSCC) was studied in 0.01 M Na2SO4 solution at temperatures ranging from 100 to 250 C under constant load conditions. The susceptibility increased in the middle of the passive potential at 150 and 175 C and in the transpassive potential at 200 and 250 C. IGSCC nucleated from the crevice corrosion (CC) around a pinhole of a flat tensile specimen occurred over a wide range of potentials at 100 C and in the transpassive potential range at temperatures ranging from 125 to 175 C. IGSCC was significantly accelerated by an artificial crevice. The susceptibility was discussed from the nature of (1) the passive film and (2) environmental solution.

Effects of H2 Additions on Stress Corrosion Cracking in a Boiling Water Reactor

CORROSION ◽  
1985 ◽  
Vol 41 (1) ◽  
pp. 19-30 ◽  
Author(s):  
M. E. Indig ◽  
J. E. Weber
Keyword(s):  
Stainless Steel ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Pressure Vessel ◽  
Corrosion Cracking ◽  
304 Stainless Steel ◽  
Pressure Vessel Steel ◽  
Aisi 304 Stainless Steel ◽  
Vessel Steel ◽  
Aisi 304

Abstract Controlled amounts of hydrogen were injected into the Dresden-2 boiling water reactor (BWR) during a five week period. The effect of the hydrogen modifed water chemistry on major structural alloys used in the BWR system was studied. The studies were conducted in a test facility consisting of two 1 L vessels which were piped to receive reactor water from the discharge side of the main recirculation pump. One of the vessels was used to measure electrochemical potentials. The second vessel was used to perform slow strain rate stress corrosion cracking tests. Electrochemical measurements were conducted continuously during normal BWR operation and during periods of hydrogen injection. The hydrogen injection caused the quantity of dissolved oxygen to decrease, which resulted in a substantial drop in corrosion potentials. At the highest injection rate, the corrosion potential of AISI 304 stainless steel dropped below the potential at which intergranular stress corrosion cracking (IGSCC) could be expected. Stress corrosion tests were conducted on severely sensitized AISI 304 stainless steel and pressure vessel steel. During normal operation, the stainless steel failed primarily by IGSCC. During H2 injection when the water contained <20 ppm O2, both IGSCC of the stainless steel and transgranular SCC of pressure vessel steel were eliminated.

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