Influence of Cold Deformation on Pitting Corrosion Resistance of ISO NBR 5832-1 Austenitic Stainless Steel Used for Orthopedic Implants

Ramírez, Alexander Hincapié; Ramirez, Cristiaann Hincapie; Costa, Isolda

doi:10.5935/0103-5053.20140105

Cited by 2 publications

(3 citation statements)

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“…The polarization curves and the data obtained clearly show that the corrosion current (j corr value) for all the heat treated samples are very low i.e. the produced alloy is very much corrosion resistance 38 . Though with the increasing %Ti the corrosion rate for all the differently heat-treated samples are increases.…”

Section: Microstructural Observation By Optical Microscopy the Micros...mentioning

confidence: 88%

Investigation on mechanical properties and corrosion resistance of Ti-modified AA5083 aluminum alloy for aerospace and automotive applications

AlGhannam

Soliman

Seikh

et al. 2023

Sci Rep

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Casting of aluminum with different concentration of alloying elements such as Mg, Mn (similar to that in AA5083) with additional percentages of 0.1, 0.2 and 0.3% Ti, are carried out using graphite crucible. The as-cast microstructure is modified by hot rolling to a thickness of ~ 2 mm. Mechanical and metallurgical and characterization of heat-treated thin sheets are carried out using tensile testing, hardness measurement, metallography, image analysis and optical microscope. By increasing the Ti content, the results show grain refinement and increase in the formation of Al3Ti which reflected positively on the mechanical properties. Specifically, Ultimate tensile strength is increased from 260 MPa (0 wt% Ti) to 345 MPa (0.3 wt% Ti) when using water quenching, 32.6% improvement for air cooling, and 23.3% for furnace cooling. Electrochemical corrosion behavior of heat-treated water quenched, air cooled and furnace cooled samples were tested in 3.5% NaCl solution. The results show that the heat-treated alloys have very good resistance against corrosion, while by increasing the Ti content, the corrosion rate increases due to the grain refinement phenomena.

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Section: Microstructural Observation By Optical Microscopy the Micros...mentioning

confidence: 88%

Investigation on mechanical properties and corrosion resistance of Ti-modified AA5083 aluminum alloy for aerospace and automotive applications

AlGhannam

Soliman

Seikh

et al. 2023

Sci Rep

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show abstract

“…Figure 1 exhibits the optical micrography of the SS. Austenite grains containing shear bands (arrows with designation A) and twins (arrows with designation B) mainly constitute the microstructure of the AISI 304 SS [25][26][27]. The presence of shear bands indicates that this material bar was strengthened through cold work.…”

Section: Characterizationmentioning

confidence: 99%

“…The presence of shear bands indicates that this material bar was strengthened through cold work. As is widely known, this can induce the formation of martensite and defects such as deformation bands through plastic deformation of the austenite grain, which can decrease its corrosion resistance [27,28]. Moreover, the microstructure was also composed of rounded particles uniformly distributed, probably inclusions resulting from the SS bar manufacturing process [29,30].…”

Section: Characterizationmentioning

confidence: 99%

The effect of chloride, sulfate, and ammonium ions on the semiconducting behavior and corrosion resistance of AISI 304 stainless steel passive film

Pesqueira,

Luiz,

Andrade

et al. 2023

Matéria (Rio J.)

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Water cooling systems usually receive additional chemical treatment and different features to prevent pitting corrosion on stainless steel which is dependent on medium factors such as species concentration. Chloride is an aggressive ion with which sulfate can act as an inhibitor. By applying cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and Mott-Schottky plots, the behavior of 304 stainless steel (304 SS) was evaluated in solutions containing chloride, sulfate and ammonium ions. The polarization curves indicated the inhibiting effect of sulfate ions against pitting corrosion and the increase of the repassivation potential with increasing ammonium concentration. The most pronounced inhibiting effect occurred with a smaller ratio between chloride and sulfate ions (1:2). By EIS, the values obtained for charge transfer resistance of 304 SS sample corroborated the results of the cyclic voltammetry, ranging between 0.4 and 0.7 MΩcm 2 . The passive film showed semiconductor behavior, in agreement with the model of the chromium oxide inner layer and iron oxide outer layer. The passive films formed were highly doped, with doping density values on the order of 10 20-21 cm -1 . The difference between the corrosion potential and the flat band potential was found in the solutions where the material was less susceptible to corrosion.

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Influence of Cold Deformation on Pitting Corrosion Resistance of ISO NBR 5832-1 Austenitic Stainless Steel Used for Orthopedic Implants

Cited by 2 publications

References 0 publications

Investigation on mechanical properties and corrosion resistance of Ti-modified AA5083 aluminum alloy for aerospace and automotive applications

Investigation on mechanical properties and corrosion resistance of Ti-modified AA5083 aluminum alloy for aerospace and automotive applications

The effect of chloride, sulfate, and ammonium ions on the semiconducting behavior and corrosion resistance of AISI 304 stainless steel passive film

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