Evaluating the effect of hydroxyapatite-chitosan coating on the corrosion behavior of 2205 duplex stainless steel for biomedical applications

Purpose Duplex stainless steel is composed of equal amounts of austenite and ferrite, which has excellent corrosion resistance and strength. However, after the metal was welded, the ratio of austenite and ferrite in the joint is unbalanced, and secondary phase precipitates are produced, which is also an important cause of pitting corrosion in the joint. Design/methodology/approach This paper aims to study the mechanical and corrosion behavior of welded joints, by adjusting the welding parameters of laser hybrid welding, dual heat sources are used to weld 2205 duplex stainless steel. The two-phase content of different parts of the welded joint is measured to study the influence of the ratio of the two-phase on the mechanical and corrosion properties of the joint. Findings The ratio of austenite and ferrite in different welded joints has an obvious difference, and from top to bottom, the austenite content decreased gradually, and the ferrite content increased gradually. The harmful phases are precipitated in the middle and lower part of the joint. The strength of welded joints is slightly lower than that of base metal. At the same time, the fracture analysis shows that some ferrite phases are affected by the precipitate in the grain and produce quasi-cleavage fracture. The corrosion results show that the corrosion resistance of the welded joints is lower than that of the base metal, and the concentration of chloride ions affects the corrosion resistance. Originality/value In this paper, the authors use the influence of different welding processes on the two-phase ratio of the joint to further study the influence of the microstructure on the corrosion resistance and mechanical properties of the weld.

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Effect of hydrogen on semiconductor properties and pitting initiation of 2205 duplex stainless steel passivation film

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-11-2019-2220 ◽

2020 ◽

Vol 67 (3) ◽

pp. 313-320 ◽

Cited By ~ 1

Author(s):

Chuanbo Zheng ◽

Jiayan Huang ◽

Gua Yi

Keyword(s):

Stainless Steel ◽

Duplex Stainless Steel ◽

Passive Film ◽

Corrosion Behavior ◽

Current Density ◽

Anodic Polarization ◽

Content Type ◽

2205 Duplex Stainless Steel ◽

Passivation Film ◽

Semiconductor Properties

Purpose This paper aims to study the effect of current density of hydrogen charging on the semiconductor properties and pitting initiation of 2205 duplex stainless steel (DSS) passivation film. Design/methodology/approach In this work, the 2205 DSS is pre-hydrogenated and passivated. Then, the passivation film is tested by electrochemical impedance method, Mott–Schottky curve method and dynamic potential scanning method. The influences of hydrogen on the properties of the passivation film and the corrosion behavior of the matrix were studied by analyzing the curves obtained in the electrochemical test. The surface of the passivation film after pre-hydrogenation and anodic polarization was observed by using the ultra-depth three-dimensional microscopy and the scanning electron microscope. The integrity, density and corrosion morphology of the passivation film were studied and discussed. Findings With the increase of the hydrogen current density, the growth of the passivation film is hindered, the concentrations of donor and acceptor in the film are increased, the conductivity of the passivation film increases. In the anodic polarization, the dimensional passive current density increases with the increase of the hydrogen current density, and the pitting potential is reversed, the more likely the sample is pitting. In general, hydrogen hinders the formation of the passive film on duplex stainless steel, which increases the concentration of point defects in the passive film. Finally, the passive film is easy to crack and pitting. Originality/value The performance of passive film is an important condition to influence the corrosion behavior of stainless steel. However, little research has been done on the effects of hydrogen on the electrochemistry and pitting sensitivity of 2205 DSS passivation films. The effect of hydrogen on semiconductor properties and pitting initiation of 2205 DSS passivation film is needed to be investigated.

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Synergistic Erosion-Corrosion Behavior of AISI 2205 Duplex Stainless Steel Elbows in Potash Brine-Sand Slurry and the Associated Microstructural Changes

Journal of Materials Engineering and Performance ◽

10.1007/s11665-020-05195-w ◽

2020 ◽

Vol 29 (11) ◽

pp. 7456-7467

Author(s):

Raheem Elemuren ◽

Richard Evitts ◽

Ikechukwuka N. A. Oguocha ◽

Jerzy Szpunar ◽

Glyn Kennell ◽

...

Keyword(s):

Stainless Steel ◽

Duplex Stainless Steel ◽

Corrosion Behavior ◽

Microstructural Changes ◽

2205 Duplex Stainless Steel ◽

Erosion Corrosion

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Effect of Hydrogen Charging on the Stress Corrosion Behavior of 2205 Duplex Stainless Steel Under 3.5 wt.% NaCl Thin Electrolyte Layer

Journal of Materials Engineering and Performance ◽

10.1007/s11665-017-2713-8 ◽

2017 ◽

Vol 26 (6) ◽

pp. 2837-2846 ◽

Cited By ~ 7

Author(s):

Tianliang Zhao ◽

Zhiyong Liu ◽

Shanshan Hu ◽

Cuiwei Du ◽

Xiaogang Li

Keyword(s):

Stainless Steel ◽

Stress Corrosion ◽

Duplex Stainless Steel ◽

Corrosion Behavior ◽

Electrolyte Layer ◽

2205 Duplex Stainless Steel ◽

Hydrogen Charging ◽

Thin Electrolyte Layer

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

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-01-2015-1488 ◽

2015 ◽

Vol 62 (3) ◽

pp. 163-171 ◽

Cited By ~ 1

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.

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