%0 Journal Article
%4 sid.inpe.br/mtc-m21b/2016/06.02.17.52
%2 sid.inpe.br/mtc-m21b/2016/06.02.17.52.07
%@doi 10.1002/adem.201500411
%@issn 1438-1656
%T Plasma nitriding and DLC coatings for corrosion protection of precipitation hardening stainless steel
%D 2016
%8 May
%9 journal article
%A Dalibón, Eugenia L.,
%A Guitar, María Agustina,
%A Trava Airoldi, Vladimir Jesus,
%A Mücklich, Frank,
%A Brühl, Sonia P.,
%@affiliation Universidad Tecnológica Nacional (FRCU)
%@affiliation Saarland University
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Saarland University
%@affiliation Universidad Tecnológica Nacional (FRCU)
%@electronicmailaddress
%@electronicmailaddress
%@electronicmailaddress vladimir.airold@inpe.br
%B Advanced Engineering Materials
%V 18
%N 5
%P 826-832
%K Age hardening, Atmospheric corrosion, Coatings, Corrosion, Corrosion protection, Corrosion resistance, Diffusion coatings, Hardening, Hardness, Nitriding, Plasma applications.
%X A duplex treatment, combining a nitriding diffusion process and the deposition of DLC coatings is investigated as an option for corrosion protection of precipitation hardening steels, in order to increase the service life of components used in plastic injection molds. Hardness and mechanical resistance are determined and the corrosion resistance in two different media is analyzed. Non-coated nitrided and non-nitrided samples are also tested for comparison. Corrosion resistance is investigated by means of immersion, salt spray, and polarization tests. No signs of atmospheric corrosion are observed after the salt spray test and in acid media, the nitrided samples, with and without DLC, present the lowest mass loss. The duplex sample shows the best corrosion behavior in the electrochemical tests. The duplex treatment consisting in plasma nitriding and DLC deposition results in a very good protection for PH stainless steel against wear and corrosion. Corrosion of DLC is mostly dependent on the density of defects that connect the electrolyte with the metal, initiating delamination, and degradation. The nitrided layer provides in interface which improves adhesion and retards this corrosion process.
%@language en
%3 dalibon_plasma.pdf