Page 28 - PR 2014 2016 10 Materials and Nanotechnology

304 Materials and Nanotechnology | Progress Report

the industrial process adopted by the aircraft aim of the present work, which proposes
industry, and subsequently sealed, either in the development, and characterization of
boiling water or in a solution with cerium coatings for application to the 22MnB5 steel
ions. The aim of this study is to investigate in replacement of aluminum silicon coatings
the effect of sealing treatments with Cerium (Figure 36). The low use of high strength steels
ions on the corrosion protection of anodized in Brazil is due to the high cost of the plates,
aluminum alloys. The surface of the anod- today imported. The preparation of these
ized and sealed samples has been evaluated new materials has as fundamental step, the
by Scanning Electron Microscopy and X-ray necessity of use of advanced X-ray diffrac-
energy dispersive analysis. The corrosion re- tion at grazing incidence, available in the
sistance of the alloys has been monitored as National Synchrotron Light Laboratory - LNLS
a function of time by electrochemical imped- in Campinas - SP (Figure 37). The objective
ance spectroscopy. The results indicate that of this study is to shed light on what occurs
sealing in cerium ions containing solution during the processing of plates coated with
increases corrosion resistance and the long zinc and nickel during hot stamping.
duration of the resistance with time of immer-
sion is related to repair of corroded areas by
formation of corrosion products that heal the
defective sites indicating a healing process.

Protective coatings against corrosion for
innovative automotive chassis: studies
in situ by time-resolved synchrotron
radiation

The Brazilian automotive industries are tar-
geted to meet the program called Inovar-Au-
to. This Incentive Program for Technological
Figure 36: Hot stamped steel coated with zinc-nickel.
Innovation and Intensification of Production
Chain for Motor Vehicles (Inovar-Auto) is an
action taken by the Brazilian Federal Gov-
ernment in order to encourage investment
in the domestic auto industry. Companies,
from 2016, are required to meet targets for
reducing fuel consumption and CO emission
2
to obtain tax reductions, as well as to continue
being competitive in the national and inter-
national markets. The assumptions of this
project are to study by time-resolved X-ray
diffraction, using synchrotron radiation, steel
plates meant for hot stamping. It is important
that a new coating with specific properties be
developed to enable hot stamping and further
application of automotive paint. This is the

Instituto de Pesquisas Energéticas e Nucleares