Suárez, Carlos Vilar, Teresa Sevilla, Pablo Gil, Javier <jats:p><jats:italic>Objectives</jats:italic>. To investigate the in vitro electrochemical corrosive behavior of archwires used in lingual orthodontics and the effects on the phase transition temperatures.<jats:italic>Materials and Methods</jats:italic>. Six different types of archwires of stainless steel, titanium-molybdenum, nickel-titanium and nickel-titanium-copper were used. Corrosion tests were performed following ISO-standard 10993-15:2000. Differential scanning calorimetry and scanning electron microscopy were used.<jats:italic>Results</jats:italic>. The stainless steel archwires showed an<jats:italic>E</jats:italic><jats:sub>pit</jats:sub>around −600 mV, and those of titanium alloys showed<jats:italic>E</jats:italic><jats:sub>pit</jats:sub>values around 1000 mV. Differential scanning calorimetry detected a rhombohedral phase in nickel-titanium archwires, while it was not detected in nickel-titanium-copper wires. A difference of 2°C to 3.5°C from the manufacturer's claim was found in the as-received and polarized samples, respectively.<jats:italic>Conclusions</jats:italic>. The 0.016 stainless steel archwires were found to be the less resistant to corrosion. A rhombohedral phase was detected on the nickel-titanium archwires. No major differences were observed among groups concerning phase transformation temperatures.</jats:p> application/pdf https://sonar.ch/global/documents/293532 eng info:eu-repo/semantics/altIdentifier/doi/10.1155/2011/482485 info:eu-repo/semantics/altIdentifier/issn/1687-9325 info:eu-repo/semantics/openAccess International Journal of Corrosion. - Hindawi Limited. - 2011, vol. 2011, p. 1-9 In Vitro Corrosion Behavior of Lingual Orthodontic Archwires http://purl.org/coar/resource_type/c_6501