Blog
About

3
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Influência da rugosidade na resistência à corrosão por pite em peças torneadas de aço inoxidável superaustenítico Translated title: Influence of roughness on the pitting corrosion resistance of turned superaustenitic stainless steel

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          A resistência à corrosão por pite tem sido correlacionada com as condições morfológicas da superfície: um acabamento superficial liso contribui para diminuir o potencial de iniciação de pites. Esse estudo teve por objetivo investigar a relação entre a resistência à corrosão por pite e a rugosidade em superfícies usinadas do aço inoxidável superaustenítico ASTM A744 grau CN3MN. As amostras fundidas sofreram um torneamento cilíndrico com diferentes combinações das condições de corte, resultando, assim, em diferentes padrões de rugosidade superficial. As superfícies das amostras, então usinadas, foram caracterizadas quanto à rugosidade e ao endurecimento. Após submetidas a um teste por imersão, que acelerava a corrosão, essas superfícies foram examinadas num esteroscópio, tendo sido, também, determinada a perda de peso devido à corrosão. Observou-se que as amostras exibiram diferentes comportamentos com relação à resistência à corrosão, de acordo com as condições de usinagem aplicadas. Uma correlação entre a resistência à corrosão e a rugosidade superficial ficou evidente, assim como à perda de peso devido à formação de pites. Esse estudo identificou que a corrosão pode ser controlada através da seleção dos parâmetros de usinagem apropriados.

          Translated abstract

          Pitting corrosion resistance has been correlated to the morphological conditions of the surface: a smooth surface finishing decreases the potential for pitting. This study aimed at investigating the relationship between pitting corrosion resistance and surface roughness in the machined surfaces of superaustenitic stainless steel ASTM A744 grade CN3MN. The samples of the casting steel were cylindrically turned sunder different combinations of cutting conditions, producing different surface roughness patterns. The surfaces of the samples, as machined, were characterized by roughness and hardness. After the application of an accelerated immersion corrosion test, these surfaces were examined in a stereoscope and the weight loss by corrosion was also determined. It was revealed that the samples exhibited different corrosion resistance behaviors, according to the machining conditions applied. A correlation between pitting resistance corrosion and machined surface roughness was evident, and also, the weight loss due to the formation of pits. This study has identified that corrosion can be controlled through the selection of appropriate machining parameters.

          Related collections

          Most cited references 17

          • Record: found
          • Abstract: not found
          • Article: not found

          Metal Cutting Principles

           M.C. Shaw,  M Shaw,  MC Shaw (2005)
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Dependence of the Critical Pitting Temperature on surface roughness

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              An alternative method to determine critical pitting temperature of stainless steels in ferric chloride solution

                Bookmark

                Author and article information

                Affiliations
                [1 ] Sulzer Brasil S/A
                [2 ] Sulzer Brasil S/A
                [3 ] Universidade Estadual de Campinas Brazil
                [4 ] Universidade Estadual de Campinas Brazil
                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rem
                Rem: Revista Escola de Minas
                Rem: Rev. Esc. Minas
                Escola de Minas (Ouro Preto )
                1807-0353
                March 2010
                : 63
                : 1
                : 77-82
                S0370-44672010000100013 10.1590/S0370-44672010000100013

                http://creativecommons.org/licenses/by/4.0/

                Product
                Product Information: SciELO Brazil
                Categories
                ENGINEERING, CIVIL
                METALLURGY & METALLURGICAL ENGINEERING

                Comments

                Comment on this article