@Article{SavonovCaRoBaMaRe:2019:StInRR,
author = "Savonov, Graziela da Silva and Camarinha, Maria Gabriela
Galv{\~a}o and Rocha, Let{\'{\i}}cia Oliveira and Barboza,
Miguel Justino Ribeiro and Martins, Gislene Valdete and Reis,
Danieli Aparecida Pereira",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and
{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and
{Universidade de S{\~a}o Paulo (USP)} and {Instituto
Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Universidade
Federal de S{\~a}o Paulo (UNIFESP)}",
title = "Study of the influence of the RRA thermal treatment and plasma
nitriding oncorrosion behavior of 7075-T6 aluminum alloy",
journal = "Surface and Coatings Technology",
year = "2019",
volume = "374",
pages = "736--744",
month = "Sept.",
keywords = "7075 aluminum alloy, Corrosion, RRA, Plasma nitriding.",
abstract = "Aluminum alloys are mainly used in aircraft's structural
components, which present the fatigue process as a predominant
failure mode. The fact that there are many airports in coastal
regions makes the study of aluminum alloy corrosive processes
relevant as localized corrosion causes adverse effects on
mechanical properties of the material. Plasma nitriding is an
alternative method of raising surface hardness, fatigue
resistance, wear and corrosion of alloys, there is a trend to
expand the applicability of the plasma nitriding process through
utilization of new materials and nitriding of aluminum and its
alloys would be of greatest interest. In order to improve the
corrosion behavior of 7075-T6 aluminum alloy, this work evaluated
and compared the effect of RRA thermal treatment and plasma
nitriding on the corrosion behavior of AA7075-T6 alloy. The tests
were performed in 3.5%wt NaCl solution at room temperature
(~25\ °C) and pH\ ~\ 6. The linear
potentiodynamic polarization study showed that RRA thermal
treatment and plasma nitriding were effective in improving
corrosion behavior in saline solution. The protective efficiency
of plasma nitriding was 64.2% and RRA treatment was 18.4%. The
corrosive process at the T6 condition was deeper and generalized,
with a high concentration of corrosion pits. For the RRA
condition, the process was less generalized and not so deep, while
in the plasma nitrided condition it was more localized and
superficial, preserving much of the exposed surface in the
corrosion tests. These results can be considered very promising by
indicating an increase in the useful life of this material. This
directly implies a consequent reduction in the preventive
maintenance costs of the industries that use this alloy, as
replacing damaged parts that have been treated by the plasma
assisted technique used in this study may be performed at longer
time intervals than the alloy parts without any kind of
treatment.",
doi = "10.1016/j.surfcoat.2019.04.095",
url = "http://dx.doi.org/10.1016/j.surfcoat.2019.04.095",
issn = "0257-8972",
language = "en",
targetfile = "savonov_study.pdf",
urlaccessdate = "26 abr. 2024"
}