SYMPOSIA PAPER Published: 01 January 2003

Comparative Electrochemical Studies of F 1586-95 and F 138-92 Stainless Steels in Sodium Chloride, pH = 4.0 Medium


In this work, ASTM F 1586-95 stainless steel used for surgical implants is studied in 0.9 % NaCl aqueous solution, pH = 4.0 at 40 °C, using potentiodynamic polarization curves and optical surface analysis techniques and its performance is compared to F 138 stainless steel. F 1586-95 remains passivated until transpassivation potential above, which shows only generalized corrosion. F 138-92 presents breakdown potentials of 370 mV / SCE, with the presence of pitting corrosion. The presence of 0.40 % Nb in F 1586-95 promotes passivation currents one order of magnitude higher than that observed for F 1586-95 containing 0.28 % Nb.

Author Information

Villamil, RFV
Institute de Química, Universidade de São Paulo, São Paulo, SP, Brazil
de Andrade, AHP
Instituto de Pesquisas Energéticas e Nucleares (IPEN) Trav. R 400 — Cidade Universitária, S.P, Brazil
Barbosa, CA
Villares Metals S. A., Sumaré, SP, Brazil
Sokolowski, A
Villares Metals S. A., Sumaré, SP, Brazil
Agostinho, SML
Instituto de Química, Universidade de São Paulo, Säo Paulo, SP, Brazil
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Developed by Committee: F04
Pages: 168–175
DOI: 10.1520/STP11162S
ISBN-EB: 978-0-8031-5483-4
ISBN-13: 978-0-8031-3459-1