To evaluate the corrosion performance and nano-mech. behavior of a brass substrate covered by different thick SiO2 layers deposited by plasma enhanced chem. vapor deposition (PECVD) technique. The comparison between lab. and "industrial" objects revealed a very good corrosion behavior and good mech. performance of both of them: in particular it was possible to modulate the surface treatment to solve various problems from the industrial point of view. It was possible to reduce the Cu migration into the SiO2 coating during the PECVD deposition at a negligible level and to control it by the deposition; further, the nano-indentation tests revealed the great utility of the coating annealing in obtaining a significant improvement of the mech. properties of the coated objects. Even if some industrial problems were solved (minimization of the presence of the coating defects and transparency of the coatings), some on the layer hardness (anti-wear behavior of the industrial objects) has to be better investigated and possibly solved. The work reports a deposition process that is carried out industrially over a 2-yr period. This research reports a PECVD process realized on industrial objects: the originality is in the reached corrosion and mech. performances that made it possible to realize a satisfactory industrial deposition.
Corrosion protection and mechanical performance of SiO2 films deposited via PECVD on OT59 brass
G Rossetto
2005
Abstract
To evaluate the corrosion performance and nano-mech. behavior of a brass substrate covered by different thick SiO2 layers deposited by plasma enhanced chem. vapor deposition (PECVD) technique. The comparison between lab. and "industrial" objects revealed a very good corrosion behavior and good mech. performance of both of them: in particular it was possible to modulate the surface treatment to solve various problems from the industrial point of view. It was possible to reduce the Cu migration into the SiO2 coating during the PECVD deposition at a negligible level and to control it by the deposition; further, the nano-indentation tests revealed the great utility of the coating annealing in obtaining a significant improvement of the mech. properties of the coated objects. Even if some industrial problems were solved (minimization of the presence of the coating defects and transparency of the coatings), some on the layer hardness (anti-wear behavior of the industrial objects) has to be better investigated and possibly solved. The work reports a deposition process that is carried out industrially over a 2-yr period. This research reports a PECVD process realized on industrial objects: the originality is in the reached corrosion and mech. performances that made it possible to realize a satisfactory industrial deposition.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
