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Gravier J.,CEA Valduc Center for Nuclear Studies | Gravier J.,Laboratory Interdisciplinaire Carnot de Bourgogne | Gravier J.,Laboratoire Of Recherche Correspondant Limpe | Vignal V.,Laboratory Interdisciplinaire Carnot de Bourgogne | And 3 more authors.
Corrosion Science | Year: 2012

The influence of quadratic stress, crystallographic texture, lubrication and surface roughness generated by superfinish turning on the corrosion behaviour of pure copper was quantified in salt-fog atmosphere. This was done using statistical analysis (Pearson's correlation matrix). Three compounds were found after corrosion tests: atacamite/paratacamite and a black layer (mixture of the lubricant and the salt atmosphere). Surface characteristics were classified according to their decreasing influence on the formation of atacamite/paratacamite as follows: surface roughness and quadratic stress. Lubrication and the crystallographic texture have the lowest influence on corrosion processes. Surface observations revealed that general dissolution occurred under atacamite/paratacamite. © 2012 Elsevier Ltd. Source


Vignal V.,University of Burgundy | Vignal V.,Laboratoire Of Recherche Correspondant Limpe | Bissey-Breton S.,Laboratoire Of Recherche Correspondant Limpe | Bissey-Breton S.,French Atomic Energy Commission | And 3 more authors.
International Journal of Machining and Machinability of Materials | Year: 2014

The influence of different combinations of cutting conditions on the mechanical behaviour (microhardness), the microstructure and the corrosion behaviour in NaCl solution (using the electrochemical microcell technique and pulse potentiodynamic testing) of a low carbon martensitic stainless steel (grade X4CrNiMo16.5.1 stainless steel) after tempering treatment was studied. Microhardness was increased on the machined surface. In addition, the electrochemical experiments have shown that the machined materials have a heterogeneous electrochemical behaviour. Significant effect of machining on pitting corrosion was noticed. The pitting potential was found to decrease as the microhardness increases. Copyright © 2014 Inderscience Enterprises Ltd. Source

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