A cataphoretic deposition process is used to realize an organic coating on aluminum foam, in order to increase its durability. Cataphoresis is recognized to ensure high adhesion properties of the coating and good homogeneity, even for surfaces with a complex geometry. The aim of this paper is the optimization of the deposition process and the evaluation of the protection properties of the cataphoretic coating deposited on the aluminum foam. The characteristics of the obtained coatings are assessed by microscopic observation of the thickness dimensions of the protective layer and the presence of defects. The corrosion behavior of the painted foam is evaluated by exposure in acetic acid salt spray chamber and by electrochemical impedance spectroscopy. With higher deposition voltage (300 V), coatings with greater thickness are achieved, containing a minimum presence of defects. These samples also show good corrosion resistance after 1500 h of exposure in acetic salt spray testing cabinet. The relatively low level of the coating defectiveness is confirmed by electrochemical impedance measurements.

Corrosion protection of aluminum foams by cataphoretic deposition of organic coatings / Rossi, Stefano; Calovi, Massimo; Fedel, Michele. - In: PROGRESS IN ORGANIC COATINGS. - ISSN 0300-9440. - STAMPA. - 109:(2017), pp. 144-151. [10.1016/j.porgcoat.2017.04.042]

Corrosion protection of aluminum foams by cataphoretic deposition of organic coatings

Rossi, Stefano;Calovi, Massimo;Fedel, Michele
2017

Abstract

A cataphoretic deposition process is used to realize an organic coating on aluminum foam, in order to increase its durability. Cataphoresis is recognized to ensure high adhesion properties of the coating and good homogeneity, even for surfaces with a complex geometry. The aim of this paper is the optimization of the deposition process and the evaluation of the protection properties of the cataphoretic coating deposited on the aluminum foam. The characteristics of the obtained coatings are assessed by microscopic observation of the thickness dimensions of the protective layer and the presence of defects. The corrosion behavior of the painted foam is evaluated by exposure in acetic acid salt spray chamber and by electrochemical impedance spectroscopy. With higher deposition voltage (300 V), coatings with greater thickness are achieved, containing a minimum presence of defects. These samples also show good corrosion resistance after 1500 h of exposure in acetic salt spray testing cabinet. The relatively low level of the coating defectiveness is confirmed by electrochemical impedance measurements.
Rossi, Stefano; Calovi, Massimo; Fedel, Michele
Corrosion protection of aluminum foams by cataphoretic deposition of organic coatings / Rossi, Stefano; Calovi, Massimo; Fedel, Michele. - In: PROGRESS IN ORGANIC COATINGS. - ISSN 0300-9440. - STAMPA. - 109:(2017), pp. 144-151. [10.1016/j.porgcoat.2017.04.042]
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0300944017301686-main.pdf

Solo gestori archivio

Tipologia: Versione editoriale (Publisher’s layout)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.24 MB
Formato Adobe PDF
2.24 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/177669
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 22
social impact