Page 312 - 00. Complete Version - Progress Report IPEN 2014-2016

312 Materials and Nanotechnology | Progress Report

or in a solution with cerium ions. The aim of kets. The assumptions of this project are to
this study is to investigate the effect of sealing study by time-resolved X-ray diffraction, us-
treatments with Cerium ions on the corrosion ing synchrotron radiation, steel plates meant
protection of anodized aluminum alloys. The for hot stamping. It is important that a new
surface of the anodized and sealed samples coating with specific properties be developed
has been evaluated by Scanning Electron Mi- to enable hot stamping and further applica-
croscopy and X-ray energy dispersive analy- tion of automotive paint. This is the aim of
sis. The corrosion resistance of the alloys has the present work, which proposes the devel-
been monitored as a function of time by elec- opment, and characterization of coatings for
trochemical impedance spectroscopy. The re- application to the 22MnB5 steel in replace-
sults indicate that sealing in cerium ions con- ment of aluminum silicon coatings (Figure 36).
taining solution increases corrosion resistance The low use of high strength steels in Brazil
and the long duration of the resistance with is due to the high cost of the plates, today im-
time of immersion is related to repair of cor- ported. The preparation of these new mate-
roded areas by formation of corrosion prod- rials has as fundamental step, the necessity
ucts that heal the defective sites indicating a of use of advanced X-ray diffraction at graz-
healing process ing incidence, available in the National Syn-
chrotron Light Laboratory - LNLS in Campinas
Protective coatings against - SP (Figure 37). The objective of this study is
corrosion for innovative automotive to shed light on what occurs during the pro-
chassis: studies in situ by time- cessing of plates coated with zinc and nickel
resolved synchrotron radiation

during hot stamping.
Figure 36: Hot
stamped steel
coated with
zinc-nickel.

The Brazilian automotive industries are tar-
geted to meet the program called Inovar-Au-
to. This Incentive Program for Technological
Innovation and Intensification of Production
Chain for Motor Vehicles (Inovar-Auto) is an
action taken by the Brazilian Federal Govern-
ment in order to encourage investment in the
domestic auto industry. Companies, from 2016,
are required to meet targets for reducing fuel
consumption and CO2 emission to obtain tax
reductions, as well as to continue being com-
petitive in the national and international mar-

Instituto de Pesquisas Energéticas e Nucleares