Stress Corrosion Cracking Behavior of 90/10 Cu-Ni Alloy in Sodium Sulfide Solutions

CORROSION ◽  
1991 ◽  
Vol 47 (4) ◽  
pp. 260-268 ◽  
Author(s):  
M. Islam ◽  
W. T. Riad ◽  
S. Al-Kharraz ◽  
S. Abo-Namous
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Room Temperature ◽  
Copper Matrix ◽  
Selective Dissolution ◽  
Corrosion Cracking ◽  
Cracking Behavior ◽  
Epma Analysis ◽  
Ni Alloy ◽  
Film Interface

Abstract The stress corrosion cracking (SCC) of 90/10 Cu-Ni alloy in sulfide solutions is not reported in the literature. The SCC behavior of the alloy was studied in dilute and concentrated Na2S solutions at room temperature. The alloy was found to be susceptible to SCC under slow strain rate conditions in the concentrated (0.1 to 1 M) sulfide solutions, but not in the dilute (0.002 to 0.03 M) solutions. On the basis of electrochemical data and EPMA analysis of the metal/film interface of the cracked samples, the mechanism of cracking can possibly be attributed to a dealloying (selective dissolution) phenomenon where the copper matrix but not the solute Ni is selectively removed.

Multi Scale Characterization of Stress Corrosion Cracking of Alloy X750

2013 ◽  
Vol 1519 ◽  
Author(s):  
Kevin Fisher ◽  
Sébastien Teysseyre ◽  
Emmanuelle A Marquis
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Atom Probe ◽  
Corrosion Cracking ◽  
Twin Boundaries ◽  
Cracking Behavior ◽  
Multi Scale ◽  
Ni Alloy ◽  
Scale Characterization ◽  
Boundary Chemistry

ABSTRACTGrain boundary chemistry in an X750 Ni alloy was analyzed by atom probe tomography in an effort to clarify the possible roles of elemental segregation and carbide presence on the stress corrosion cracking behavior of Ni alloys. Two types of cracks are observed: straight cracks along twin boundaries and wavy cracks at general boundaries. It was found that carbides (M23C6 and TiC) are present at both twin and general boundaries, with comparable B and P segregation for all types of grain boundaries. Twin boundaries intercept γ’ precipitates while the general boundaries wave around the γ’ and carbide precipitates. Near a crack tip, oxidation takes place on the periphery of carbide precipitate.

Stress Corrosion Cracking Behavior of X60 Pipe Steel in Soil Environment

2009 ◽  
Vol 1242 ◽  
Author(s):  
Z. Velazquez ◽  
E. Guzman ◽  
M‥A. Espinosa-Medina ◽  
A. Contreras
Keyword(s):  
Strain Rate ◽  
Stress Corrosion ◽  
Soil Solution ◽  
Stress Corrosion Cracking ◽  
Room Temperature ◽  
Cathodic Polarization ◽  
Pipeline Steel ◽  
Corrosion Cracking ◽  
Time To Failure ◽  
Cracking Behavior

ABSTRACTStress corrosion cracking (SCC) susceptibility of API X60 pipeline steel in a soil solution by slow strain rate tests (SSRT), and surface fracture analysis was investigated. The SSRT were performed at strain rate of 25.4 × 10-6 mm/sec in a glass autoclave containing the soil solution called NS4 with pH of 3 and 10 at room temperature and 50°C. Both anodic and cathodic polarization potentials of 200 mV referred to Ecorr was applied. The results of ratio reduction area (RRA), time to failure ratio (TFR) and elongation plastic ratio (EPR) indicate that X60 pipeline steel was susceptible to SCC at pH 3 and cathodic polarization of -200 mV at room temperature and 50°C. Scanning electron microscopy (SEM) observations of these specimens showed a brittle type of fracture with transgranular appearance. The SCC process and mechanism of X60 steel into NS4 solution was hydrogen based mechanism. With the different applied potentials the dominance of SCC process changes. At low pH the temperature effect on SCC susceptibility is more noticeable at 20°C. However at high pH this effects changes, being the steel more susceptible to SCC at 50°C.

STUDY OF MICROSTRUCTURE AND STRESS CORROSION CRACKING BEHAVIOR IN WELDING TRANSITION ZONE OF Ni--BASED ALLOYS

2011 ◽  
Vol 46 (10) ◽  
pp. 1258-1266 ◽  
Author(s):  
Juan HOU ◽  
Qunjia PENG ◽  
SHOJI Testuo ◽  
Jianqiu WANG ◽  
Wei KE ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Transition Zone ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Cracking Behavior

Anodic characteristics and stress corrosion cracking behavior of nickel rich alloys in bicarbonate and buffer solutions

2016 ◽  
Vol 108 ◽  
pp. 1-10 ◽  
Author(s):  
Natalia S. Zadorozne ◽  
Mabel C. Giordano ◽  
Alicia E. Ares ◽  
Ricardo M. Carranza ◽  
Raul B. Rebak
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Cracking Behavior ◽  
Buffer Solutions
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