%0 Journal Article
%T Qualidade do a£¿o inoxid¨¢vel martens¨ªtico do tipo AISI-420 utilizado na confec£¿£¿o de ferramentas cir¨²rgicas
%A Rodrigues
%A C¨¦sar Augusto Duarte
%A Enokibara
%A Fausto
%A Leiva
%A Tomaz Puga
%A Nunes
%A Ivani Aparecida
%A Rollo
%A Jo£¿o Manuel Domingos de Almeida
%J Rem: Revista Escola de Minas
%D 2009
%I Escola de Minas
%R 10.1590/S0370-44672009000400010
%X until now the martensitic stainless steel type aisi-420 is widely used in the manufacture of surgical implements. these implements present premature corrosion problems identified after cleaning, , sterilization and cutting edge loss and/or rupture during the surgical processes. this study evaluates the steel as to the chemical composition, hardness, microstructure and pitting corrosion resistance in a solution of enzyme detergent diluted in water by anodic cyclic polarization. this mixture is used in the cleaning of surgical implements that are submerged in this solution for 2 h before cleaning and sterilization. the results show steels with martensite microstructures in the ferrite phase, together wth impurities. these presented low pitting potential values in compariston to steels with a fully martensitic microstructure.
%K martensitic stainless steel
%K microstructure
%K pitting corrosion.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0370-44672009000400010&lng=en&nrm=iso&tlng=en