Effect of duplex treatments by plasma nitriding and triode sputtering on corrosion behaviour of 32CDV13 low alloy steel
TypeArticles dans des revues avec comité de lecture
This paper presents corrosion behaviour of duplex treated low alloy steel. Different kinds of samples were tested: non-treated, plasma nitrided, ZrBN-triode sputtered and ZrBN-duplex treated samples. The corrosion behaviour was evaluated by electrochemical techniques (corrosion potential and polarisation resistance evolutions versus immersion time, potentiodynamic curves). The corrosion tests were carried out in neutral aqueous saline solution (NaCl 30 g L−1), naturally aerated. The composition and the structure of layers were determined by EDS and XRD, respectively, while the morphology was observed by SEM. Experimental results showed that the corrosion current density Icorr increased with decreasing white layer thickness in plasma nitrided specimens. The nitrides ε-Fe2 − 3N and γ′-Fe4N present in the white layer are nobler than the substrate but may promote, by galvanic effect, a localised corrosion through open porosity. The duplex treated specimens (nitriding+ZrBN coating) present better corrosion protection and enable to overcome the drawbacks of both techniques, mainly the porosity of the deposited films.
Showing items related by title, author, creator and subject.
NOUVEAU, Corinne; LABIDI, Chafik; FERREIRA-MARTIN, Jean-Pierre; COLLET, Robert; DJOUADI, Mohamed Abdou (Elsevier, 2007)This study deals with the development of Chromium Aluminium Nitride (CrAlN) hard coatings (by varying the nitrogen content in the plasma, the target bias voltage, the working pressure and the deposition time) and their ...
TLILI, Brahim; NOUVEAU, Corinne; BENLATRECHE, Yacine; MUSTAPHA, Nasri; LAMBERTIN, Michel (2009)In the present investigation, novel Cr/CrN, CrN/CrAlN and Cr/CrN/CrAlN multilayered coatings thin films have been developed by dual RF magnetron sputtering. They consist of superposing Cr, CrN and CrAlN layers of 50–500nm ...
Correlation between thermal properties and aluminum fractions in CrAlN layers deposited by PVD technique TLILI, Brahim; MUSTAPHA, Nasri; NOUVEAU, Corinne; BENLATRECHE, Yacine; GUILLEMOT, Gildas; LAMBERTIN, Michel (Elsevier, 2010)The CrAlN coatings are a good alternative to conventional CrN coatings especially for high temperature oxidation-resistance applications. Different CrAlN coatings were deposited on silicon (100) by PVD (Physical vapor ...
Experimental investigation of the mechanical micro structural and thermal properties of thin CrAIN layers deposited by PVD technique for various aluminum percentages GHRIB, Taher; TLILI, Brahim; NOUVEAU, Corinne; BENLATRECHE, Yacine; LAMBERTIN, Michel; YACOUBI, Noureddine; ENNASRI, M. (Elsevier, 2009)The thin film of chromium nitride and their derivatives obtained by the filing process physical vapor deposition attract more and more attention from industry given their high resistance to wear. This quality of these ...
Effect of surface finishing such as sand-blasting and CrAlN hard coatings on the cutting edge’s peeling tools’ wear resistance NOUVEAU, Corinne; LABIDI, Chafik; COLLET, Robert; BENLATRECHE, Yacine; DJOUADI, Mohamed Abdou (Elsevier, 2009)The aim of this study is first to define the effect of a surface finishing such as sand-blasting on the geometry of a wood cutting tool and its wear resistance. In addition, the effectiveness of surface coatings like CrAlN ...