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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of titanium nitride (TiN) on the corrosion behavior of a supermartensitic stainless steel

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Author(s):
Rodrigues, Cesar Augusto D. [1] ; Bandeira, Rafael M. [1] ; Duarte, Barbara B. [1] ; Tremiliosi-Filho, Germano [1] ; Roche, Virginie [2] ; Jorge, Jr., Alberto M. [2, 3, 4]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, Av Trabalhador Sao Carlense 400, CP 780, BR-13560970 Sao Carlos, SP - Brazil
[2] Grenoble Alpes Univ, CNRS, UMR 5266, LEPMI Lab, Inst Polytech, BP 75, F-38402 St Martin Dheres - France
[3] Univ Fed Sao Carlos, Dept Engn Mat, Rodovia Washington Luiz, Km 235, CP 676, BR-13560270 Sao Carlos, SP - Brazil
[4] Grenoble Alpes Univ, CNRS, UMR 5266, SIMAP Lab, Inst Polytech, BP 75, F-38402 St Martin Dheres - France
Total Affiliations: 4
Document type: Journal article
Source: MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION; v. 70, n. 1, p. 28-36, JAN 2019.
Web of Science Citations: 1
Abstract

This study evaluates the effect of high N, Ni, and Ti contents on the microstructure and corrosion properties of a supermartensitic stainless steel when immersed in a 3.5% NaCl solution. Tempering procedure at several temperatures resulted in a martensitic microstructure composed of grains ranging from 60 to 70 mu m, TiN microparticles, and austenite. The sample treated at 610 degrees C showed better corrosion resistance due to the lower current density of the anodic polarization curve and less negative pitting potential, which was thoroughly influenced by the content of austenite (6.2 vol%). Anodic curves presented current fluctuation attributed to the presence of passive film instability, due to micro-galvanic corrosion between TiN particles and matrix. Impedance analysis on the sample tempered at 610 degrees C confirmed that 6.2 vol% of austenite assists the protective film by making it thicker and more protective in chloride media. (AU)

FAPESP's process: 13/03483-2 - Synthesis and characterization of polyaniline/polyvynil choride coatings and it application in the corrosion protection of metallic alloys
Grantee:Rafael Marinho Bandeira
Support Opportunities: Scholarships in Brazil - Doctorate