The effect of high-temperature exposure on the microstructural stability and toughness property in a 2205 duplex stainless steel

2002 ◽  
Vol 338 (1-2) ◽  
pp. 259-270 ◽  
Author(s):  
T.H Chen ◽  
K.L Weng ◽  
J.R Yang
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Duplex Stainless Steel ◽  
Microstructural Stability ◽  
High Temperature Exposure ◽  
2205 Duplex Stainless Steel ◽  
Temperature Exposure

Effect of high temperature compression deformation strain rate on the microstructure and corrosion behavior of 2205 duplex stainless steel

2015 ◽  
Vol 62 (3) ◽  
pp. 163-171 ◽  
Author(s):  
Yinhui Yang ◽  
Biao Yan
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Strain Rate ◽  
Duplex Stainless Steel ◽  
Corrosion Behavior ◽  
Potentiodynamic Polarization ◽  
Phase Interface ◽  
Content Type ◽  
2205 Duplex Stainless Steel

Purpose – The aim of this paper was to investigate the effect of strain rate on microstructure and corrosion behavior of 2205 duplex stainless steel, after high-temperature compression tests. Design/methodology/approach – The specimens were prepared using a Gleeble3800 thermo-simulation machine over a range of temperatures from 850 to 1,250°C and strain rates from 0.005 to 5 s−1, and the corresponding flow curves and deformation microstructure obtained were further analyzed. To evaluate the effect of strain rate on corrosion behavior, potentiodynamic polarization tests and double-loop electrochemical potentiodynamic reactivation (DL-EPR) were used to characterize the electrochemical performance. Findings – Compared with strain rate of 0.5 s−1, the worst corrosion resistance behavior from the potentiodynamic polarization test results after deformation at 0.005 s−1 was attributed to more austenite (γ) and ferrite (δ) grain boundaries or δ/γ phase interface formation due to the better effect of γ dynamic recrystallization (DRX) or δ dynamic recovery (DRV). Increasing strain rate to 5 s−1 lowered the corrosion resistance, due to the increase in dislocation density. At the low strain rate of 0.005 s−1, the susceptibility to intergranular corrosion (IGC) was comparatively high after deformation at 1050 and 1150°C with more γ/γ grains and δ/γ phase boundary formation, which was lowered with the strain rate increase to 0.5 s−1, due to suppressing effect of γ DRX. Originality/value – The paper provides the scientific basis for the practical application of hot working of 2205 duplex stainless steel.

Corrosion behavior of 2205 duplex stainless steel in acidizing stimulation solution for oil and gas wells at 200°C

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Juan Du ◽  
Mengyao Yu ◽  
Pingli Liu ◽  
Yongqiang Fu ◽  
Gang Xiong ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Acetic Acid ◽  
High Temperature ◽  
Duplex Stainless Steel ◽  
Oil And Gas ◽  
Acid Solutions ◽  
Gas Wells ◽  
Content Type ◽  
X Ray ◽  
2205 Duplex Stainless Steel

Purpose This paper aims to analyze the high temperature (200°C) corrosion behavior of 2205 duplex stainless steel in acidizing stimulation solution containing hydrochloric acid (HCl) and acetic acid. Design/methodology/approach The corrosion rate of 2205 duplex stainless steel in all kinds of acid solutions was calculated through immersion tests and electrochemical test. The corrosion product composition is analyzed by X-ray diffraction analysis. The element composition and element distribution before and after corrosion were analyzed by an X-ray energy spectrometer. The corrosion morphology of the steel surface was observed by a scanning electron microscope. Both static and dynamic corrosion experiments were carried out at 200°C. Findings The results show that 2205 duplex stainless steel has excellent corrosion resistance in low to high concentration acetic acid solutions, but increasing the concentration of Cl− in acetic acid solution will accelerate the corrosion rate. Low concentration HCl solution can cause serious corrosion to 2205 duplex stainless steel. The system of HCl and acetic acid will produce a synergistic effect on corrosion of 2205 duplex stainless steel and accelerate the corrosion. Sb2O3 is a good corrosion inhibitor synergist for high-temperature acidizing stimulation solution. Originality/value The amount of HCl that is used in acidizing stimulation is usually determined by the dissolution effect of the acid on the rocks, but for ultra-high-temperature reservoirs, the amount of HCl should be based on reducing the corrosion of oil and gas wells.

Turning machining induced microstructural stability of a high Nb-containing TiAl alloy during high temperature exposure

Rare Metals ◽  
2015 ◽  
Vol 35 (1) ◽  
pp. 77-84
Author(s):  
Lu Fang ◽  
Jun-Pin Lin ◽  
Xiao-Chan Qiu ◽  
Jin-Xiao Ou ◽  
Xian-Fei Ding
Keyword(s):  
High Temperature ◽  
Tial Alloy ◽  
Microstructural Stability ◽  
High Temperature Exposure ◽  
Temperature Exposure

Corrosion Characteristics of 2205 Duplex Stainless Steel in High Temperature and High Pressure Environment Containing H2S/CO2

2012 ◽  
Vol 236-237 ◽  
pp. 95-98 ◽  
Author(s):  
Shu Qi Zheng ◽  
Chang Feng Chen ◽  
Li Qiang Chen
Keyword(s):  
High Pressure ◽  
Stainless Steel ◽  
High Temperature ◽  
Duplex Stainless Steel ◽  
High Sensitivity ◽  
2205 Duplex Stainless Steel ◽  
Α Phase ◽  
The Matrix ◽  
Sulfide Content ◽  
High Pressure Environment

The corrosion characteristics of 2205 duplex stainless steel in high- temperature and high-pressure (HT and HP) environments containing H2S/CO2 are investigated in this paper. After corroded 720 hours in the condition of 3.5 MPa H2S, 3.5 MPa CO2, 205°C, 15% NaCl and a sulfide content of 3g/L, one layer of comparably thick corrosion product are formed on the surface of the specimens. The corrosion products, which are relatively porous, lose its protection to the matrix. Lots of pitting are found on the surface of the steel and intercrystalline fracture and transcrystalline fracture are generated in the bottom of the pitting, which indicates its high sensitivity to stress corrosion crack (SSC). Also, the phenomenon of selective corrosion, a priority corrosion of α phase and minor corrosion or non-corrosion of γ phase, is observed after the corrosion process.

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