The paper investigates the corrosion behavior of AlSi10Mg alloy produced by direct metal laser sintering (DMLS). Potentiodynamic tests were performed in aerated diluted Harrison solution, on specimens with different orientation with respect to the building plane. Different surface finishing were analyzed, covering rough surfaces as produced by DMLS and after polishing by means of emery papers and alumina slurry or chemical polishing with phosphoric and nitric acid bright dipping (BD). A conversion treatment by short immersion in Ce(III) salt solution was evaluated in order to improve corrosion resistance of both as-produced surface and polished surface. Selective attack of α-Al phase occurs at the border of the melting pools, typical of DMLS process, and slightly reduces on transversal planes, perpendicular to the building plane. Acid pickling slightly improves the corrosion resistance of as-produced surface, but no positive effects were noticed on polished one. The Ce(III) conversion treatment does not inhibit corrosion on as-produced specimens. Its effectiveness is higher on polished and pickled specimens. On polished surface, the effectiveness of conversion treatment mainly depends on plane orientation.

(2016). Corrosion resistance of direct metal laser sintering AlSiMg alloy [journal article - articolo]. In SURFACE AND INTERFACE ANALYSIS. Retrieved from http://hdl.handle.net/10446/72934

Corrosion resistance of direct metal laser sintering AlSiMg alloy

CABRINI, Marina;LORENZI, Sergio;PASTORE, Tommaso;PELLEGRINI, Simone;
2016-01-01

Abstract

The paper investigates the corrosion behavior of AlSi10Mg alloy produced by direct metal laser sintering (DMLS). Potentiodynamic tests were performed in aerated diluted Harrison solution, on specimens with different orientation with respect to the building plane. Different surface finishing were analyzed, covering rough surfaces as produced by DMLS and after polishing by means of emery papers and alumina slurry or chemical polishing with phosphoric and nitric acid bright dipping (BD). A conversion treatment by short immersion in Ce(III) salt solution was evaluated in order to improve corrosion resistance of both as-produced surface and polished surface. Selective attack of α-Al phase occurs at the border of the melting pools, typical of DMLS process, and slightly reduces on transversal planes, perpendicular to the building plane. Acid pickling slightly improves the corrosion resistance of as-produced surface, but no positive effects were noticed on polished one. The Ce(III) conversion treatment does not inhibit corrosion on as-produced specimens. Its effectiveness is higher on polished and pickled specimens. On polished surface, the effectiveness of conversion treatment mainly depends on plane orientation.
journal article - articolo
2016
Cabrini, Marina; Lorenzi, Sergio; Pastore, Tommaso; Pellegrini, Simone; Pavese, Matteo; Fino, Paolo; Ambrosio, Elisa Paola; Calignano, Flaviana; Manfr...espandi
(2016). Corrosion resistance of direct metal laser sintering AlSiMg alloy [journal article - articolo]. In SURFACE AND INTERFACE ANALYSIS. Retrieved from http://hdl.handle.net/10446/72934
File allegato/i alla scheda:
File Dimensione del file Formato  
ASST2015manuscript final rev v3 (002).docx

Solo gestori di archivio

Versione: Documento in Pre-print
Licenza: Licenza default Aisberg
Dimensione del file 2.46 MB
Formato Microsoft Word XML
2.46 MB Microsoft Word XML   Visualizza/Apri
Cabrini_et_al-2016-Surface_and_Interface_Analysis.pdf

Solo gestori di archivio

Versione: publisher's version - versione editoriale
Licenza: Licenza default Aisberg
Dimensione del file 1.03 MB
Formato Adobe PDF
1.03 MB Adobe PDF   Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/72934
Citazioni
  • Scopus 61
  • ???jsp.display-item.citation.isi??? 53
social impact