Evaluation of Anodic Behavior of Commercially Pure Titanium in Tungsten Inert Gas and Laser Welds

Autor(es)

Orsi, Iara Augusta ^[1] ; Raimundo, Larica B. ^[1] ; Bezzon, Osvaldo Luiz ^[1] ; de Arruda Nobilo, Mauro Antonio ^[2] ; Kuri, Sebastiao E. ^[3] ; Rovere, Carlos Alberto D. ^[3] ; Pagnano, Valeria Oliveira ^[1]

Afiliação do(s) autor(es)

^[1] Sch Dent Ribeirao Preto, Dept Dent Mat & Prosthodont, Ribeirao Preto - Brazil

^[2] Sch Dent Piracicaba, Dept Prosthodont & Periodont, Piracicaba, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13560 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PROSTHODONTICS-IMPLANT ESTHETIC AND RECONSTRUCTIVE DENTISTRY; v. 20, n. 8, p. 628-631, DEC 2011.
• Citações Web of Science: 5

Resumo

Purpose: This study evaluated the resistance to corrosion in welds made with Tungsten Inert Gas (TIG) in specimens made of commercially pure titanium (cp Ti) in comparison with laser welds. Materials and Methods: A total of 15 circular specimens (10-mm diameter, 2-mm thick) were fabricated and divided into two groups: control group-cp Ti specimens (n = 5); experimental group-cp Ti specimens welded with TIG (n = 5) and with laser (n = 5). They were polished mechanically, washed with isopropyl alcohol, and dried with a drier. In the anodic potentiodynamic polarization assay, measurements were taken using a potentiostat/ galvanostat in addition to CorrWare software for data acquisition and CorrViewfor data visualization and treatment. Three curves were made for each working electrode. Corrosion potential values were statistically analyzed by the Student's t-test. Results: Statistical analysis showed that corrosion potentials and passive current densities of specimens welded with TIG are similar to those of the control group, and had lower values than laser welding. TIG welding provided higher resistance to corrosion than laser welding. Conclusion: Control specimens welded with TIG were more resistant to local corrosion initiation and propagation than those with laser welding, indicating a higher rate of formation and growth of passive film thickness on the surfaces of these alloys than on specimens welded with laser, making it more difficult for corrosion to occur. (AU)

• Processo FAPESP: 06/58428-2 - Avaliação da resistência à corrosão de soldas tungsten inert gas e a laser em titânio comercialmente puro
• Beneficiário: Larica Barbosa Raimundo
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 06/55784-2 - Avaliacao de um metodo de soldagem do titanio comercialmente puro.
• Beneficiário: Osvaldo Luiz Bezzon
• Modalidade de apoio: Auxílio à Pesquisa - Regular