Effect of native air-formed oxidation on the corrosion behavior of AA7075 aluminum alloys
PBN-AR
Instytucja
Wydział Chemiczny (Politechnika Gdańska)
Informacje podstawowe
Główny język publikacji
ENG
Czasopismo
CORROSION SCIENCE
ISSN
0010-938X
EISSN
Wydawca
DOI
URL
Rok publikacji
2014
Numer zeszytu
Strony od-do
150-155
Numer tomu
87
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
ALUMINUM
ATMOSPHERIC CORROSION
INTERMETALLICS
PASSIVE FILMS
Streszczenia
Język
Treść
The microstructure of aluminum alloys plays a key role in their corrosion resistance. In particular, the presence of intermetallic precipitates differing in the potential from the alloy matrix induces local corrosion. The study presents the effect of native air-formed oxidation on the corrosion behavior of AA 7075 aluminum alloy. Various microscopic and spectroscopic techniques were used to examine the changes occurring in the microstructure and passive layer. Anodic Mg2Si phase undergoes oxidation, which results in magnesium hydroxide being built in the passive layer. EIS analysis revealed an improvement of electrochemical properties as a result of exposure to weather conditions.
Inne
System-identifier
128766