Comparison of Corrosion Resistance in Physiological Saline Solution of Two Austenitic Stainless Steels – 316LV and REX734

Romanczuk, Eliza; Oksiuta, Z.

doi:10.1515/ama-2017-0014

Cited by 6 publications

(6 citation statements)

References 22 publications

(27 reference statements)

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“…He concluded that the brittle hard phases with a size up to 0.3 μm are niobium carbides that could possibly initiate the fatigue fracture 95 . Romanczuk et al compared the corrosion resistance of the two common austenitic stainless steels 316LV and REX 734 and found superior resistance of REX 734 after potentiodynamic measurements 18 . Previous studies highlighted similar results regarding the superior corrosion behavior of REX 734 19,96 .…”

Section: Discussionmentioning

confidence: 94%

“…The addition of further alloying elements, such as molybdenum and nitrogen, enhances the mechanical strength and corrosion resistance 17 . In addition, relatively new nitrogen strengthened austenitic stainless steels, such as REX 734™, are widely used for hip and shoulder endoprostheses as well as surgical screws and plates 18 . They exhibit an increased corrosion resistance, improved mechanical properties and a reduced content of toxic nickel in comparison to 316 L 15,19 …”

Section: Introductionmentioning

confidence: 99%

“…17 In addition, relatively new nitrogen strengthened austenitic stainless steels, such as REX 734™, are widely used for hip and shoulder endoprostheses as well as surgical screws and plates. 18 They exhibit an increased corrosion resistance, improved mechanical properties and a reduced content of toxic nickel in comparison to 316 L. 15,19 Despite the prevailing success of total hip arthroplasty (THA) with an estimated service time of 15-20 years, about 5% of implants fail prematurely within the first 10 years of service. [20][21][22] Causes of premature implant failure include infection, implant instability/dislocation, aseptic implant loosening and adverse local tissue reactions.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure‐dependent crevice corrosion damage of implant materials CoCr28Mo6, TiAl6V4 and REX 734 under severe inflammatory conditions

et al. 2022

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Fretting corrosion is associated with increased risk of premature implant failure. In this complex in vivo corrosion system, the contribution of static crevice corrosion of the joined metal alloys is still unknown. The aim of this study was to develop a methodology for testing crevice corrosion behavior that simulates the physiological conditions of modular taper junctions and to identify critical factors on corrosion susceptibility. Samples of medical grade CoCr28Mo6 cast and wrought alloy, TiAl6V4 wrought alloy and REX 734 stainless steel were prepared metallographically and the microstructure was investigated using scanning electron microscopy (SEM). Crevice formers that mimic typical geometries of taper junctions were developed. Crevice corrosion immersion tests were performed in different physiological fluids (bovine serum or phosphate buffered saline with additives of 30 mM H 2 O 2 at pH = 1) for 4 weeks at 37 C. SEM with energy dispersive X-ray spectroscopy as well as focused ion beam were used to characterize the surface morphology, investigate present damages and identify the chemical composition of residues. Macroscopic inspection showed increased crevice corrosion susceptibility of TiAl6V4 and REX 734 under severe simulated inflammatory conditions. CoCr28Mo6 cast alloy exhibited degraded areas next to Cr-and Mo-rich precipitations that were located within the opposed crevices. The results indicate that aggressive electrolyte composition and crevice heights of 50-500 μm are critical influencing factors on crevice corrosion of biomedical alloys. Furthermore, manufacturing-related microstructure of common implant alloys determines the deterioration of corrosion resistance. The developed method should be used to enhance the corrosion resistance of common implant biomaterials by an adapted microstructure.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure‐dependent crevice corrosion damage of implant materials CoCr28Mo6, TiAl6V4 and REX 734 under severe inflammatory conditions

et al. 2022

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“…It is impartial until a thermal cycle is not forced that raises the temperature above the 7-solvus. As the temperature increases above the 7-solvus, delta ferrite revives [51]. New delta ferrite will subdivide alloying elements in accord with the austenite and delta ferrite solubilities.…”

Section: Consequences Of Delta Ferrite Permanence In 304 Weldsmentioning

confidence: 99%

Depiction of Detrimental Metallurgical Effects in Grade 304 Austenitic Stainless Steel Arc Welds

Saluja¹,

Tjprc²

2018

IJMPERD

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Efforts have been made to integrate fundamental microscopic behaviour and metallurgical transformations of Grade 304 Austenitic stainless steel during solidification. Incomplete mixing during solidification of Grade 304 steel in weld pool initiates segregation that encourages the dendritic envelope motion regulated by the enlargement of dendrite tips. High segregation of chromium and molybdenum, lead to the formation of secondary ferrite that increases tendency of accumulation of intermetallic phases. Micro and macro cracks with different orientations also occur in various sections of the weld, because of low melting liquid phases in the primary weld zone or enveloping HAZ. It aggravates grain boundaries to split under the thermal and shrinkage strain during metallurgical changes. Solid-state transformation of ferrite to austenite results in separation of solidification boundaries from grain boundaries thus reduces possibility of hot cracking. But probability of fissuring in the weld HAZ in fully austenite welds is higher than in ferrite containing welds. Contending variables adjoin complexity, hence the primary intention of this review is to correlate microstructural developments of Grade 304 steel under the influence of metallurgical variations.

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“…This leads to the creation of friction couples, which causes damage to the passive layer of the implant (Figure 1b). The conditions, together with the aggressive influence of the human body environment, contribute to the development of pitting [6], crevices [7] and fretting corrosion [8]. The products generated during the degeneration of the metallic biomaterial lead to pathomorphological changes in the surrounding tissue in the form of an allergy manifesting in the form of lesions, inflammation, rash, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrided and Nitrocarburised Austenite on Pitting and Crevice Corrosion Resistance of 316 LVM Steel Implants

et al. 2020

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Harmful lesions occur in the body around multielement stabilisers made of AISI 316 LVM (Low Vacuum Melted) steel, caused by products of pitting, fretting or crevice corrosion. Preventing the effect is possible by modifying the surface of the steel implants. Therefore, the goal of the paper is the comparison of the mechanical and physiochemical properties of plates for treating deformations of the anterior chest wall made of AISI 316 LVM steel, subjected to diffusion and sterilisation processes and exposed to Ringer’s solution. The surface of the implants was subjected to electrochemical polishing, chemical passivation and, in order to modify their properties, nitrocarburised and nitrided diffusion layers were created on selected stabilisers under glow discharge conditions with the use of an active screen at a temperature of 420 °C, over 60 min. The conducted studies involved the examination of the microstructure of the formed layers, surface roughness testing, analysis of contact angles and surface free energy, examination of resistance to pitting and crevice corrosion and examination of nanohardness. On the basis of the results of the conducted studies, it was established that the most advantageous set of properties after sterilisation and exposure to Ringer’s solution was displayed by implants with a formed diffusion nitrocarburised layer.

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Comparison of Corrosion Resistance in Physiological Saline Solution of Two Austenitic Stainless Steels – 316LV and REX734

Cited by 6 publications

References 22 publications

Microstructure‐dependent crevice corrosion damage of implant materials CoCr28Mo6, TiAl6V4 and REX 734 under severe inflammatory conditions

Microstructure‐dependent crevice corrosion damage of implant materials CoCr28Mo6, TiAl6V4 and REX 734 under severe inflammatory conditions

Depiction of Detrimental Metallurgical Effects in Grade 304 Austenitic Stainless Steel Arc Welds

Effect of Nitrided and Nitrocarburised Austenite on Pitting and Crevice Corrosion Resistance of 316 LVM Steel Implants

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