Evaluation of corrosion behavior in artificial saliva of 2507 and 2205 duplex stainless steel for orthodontic wires before and after heat treatment

Abstract

The present study investigates comparison between corrosion behavior of 2507 and 2205 DSS in artificial saliva for orthodontic wires. The heat treatment is necessary for 2507 and 2205 duplex stainless steel to remove or dissolve intermetallic phases, removed segregation and to relieve any residual thermal stress in DSS which may be formed during production processes. The corrosion behavior of a 2507 and 2205 DSS in artificial saliva was studied by SEM, HV test and potentiodynamic measurements. The results indicate that the corrosion resistance mainly depends on presence of secondary phases (sigma phase) and ferrite /austenite ratio, it's revealed that the corrosion resistance of 2507 DSS higher than 2205 DSS in artificial saliva at 37 °C.

Influence of the Interpass Welding Temperature on Microstructure and Corrosion Resistance of Superduplex Stainless Steel SAF 2507

“…The samples' microstructure was revealed by chemical etching with a modified Beraha solution (80 mL of distilled water, 20 mL of hydrochloric acid, 2 g of potassium sulfite, and 2 g of ammonium bifluoride) for 10 seconds. This procedure has been used in similar researches with some adjustments [11][12][13][14][15][16] .…”

“…Shielding gases such as argon, helium, the combination of both in variable proportions and a small amount of nitrogen are commonly used. They can help to obtain the adequate austenite-ferrite phase balance 11,12 . Autogenous soldering is a process in which metal parts are joined without solder, i.e.…”

Artigo Retratado

“…In recent years, investigations of biocorrosion, galvanic corrosion, wear corrosion, fatigue corrosion and stress corrosion of titanium have been carried out with Co-Cr, Ni-Cr and stainless steels in different physiological solutions to determine their resistance to corrosion and use them in various biomedical applications, including orthodontic wires with memory, crowns and dental bridges, endo-osseous dental implants and plates for oral and maxillary surgery [5][6][7][8][9][10][11][12][13][14].…”

Biomineralization of 2304 duplex stainless steel with surface modification by electrophoretic deposition

“…Duplex stainless steel (DSS) has a double phase structure of ferrite (α) and austenite (γ), and presents a superior combination of mechanical and corrosion properties. 1–3 Generally, it contains equal parts of ferrite (body-centered cubic) and austenite (face-centered cubic) and is free from tertiary phases, such as carbides (Cr 23 C 6 ), chromium nitrides (CrN, Cr 2 N), and intermetallics (σ, χ, R), which are mandatory to achieve the best mechanical properties and corrosion resistance of DSS. 4 The success of DSS has encouraged the manufacturers to form other categories of duplex including smaller or larger quantities of alloying elements.…”