Corrosion resistance in chloride solution of the AlSi10Mg alloy obtained by means of LPBF. (21st December 2018)

• Record Type: Journal Article
• Authors: Cabrini, Marina; Lorenzi, Sergio; Pastore, Tommaso; Testa, Cristian; Manfredi, Diego; Cattano, Giulio; Calignano, Flaviana
• Other Names: Terryn Herman guestEditor.
• Is Part Of: Surface and interface analysis. Volume 51:Number 12(2019)
• Page Start: 1159
• Page End: 1164
• Publication Date: 2018-12-21
• Subjects: additive manufacturing -- Aluminium alloy -- heat treatment -- laser powders bed fusion -- pitting potential; Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.6601
• Languages: English
• ISSNs: 0142-2421

Abstract

Abstract : The paper deals with the corrosion resistance in chloride solutions of an AlSi10Mg alloy obtained by laser powder bed fusion (LPBF) process. The potentiodynamic tests were carried out in solutions having different chloride contents. The results emphasize the role of chloride concentration on localized corrosion. The increase of concentration reduces pitting potential. In addition, the influence of the post‐processing heat treatment temperature was recognized. Penetrating attacks occurred either on after low temperatures stress relieving or specimens without any treatment, promoted by selective dissolution of the α‐Al phase stimulated by galvanic coupling with noble silicon precipitates at the border of the melt pool. Such penetrating morphology was not observed after heat treatments at high temperature.