- Tytuł:
- EIS research of AW - 7020 alloy joints welded by MIG
- Autorzy:
-
Dudzik, K.
Charchalis, A. - Powiązania:
- https://bibliotekanauki.pl/articles/248097.pdf
- Data publikacji:
- 2012
- Wydawca:
- Instytut Techniczny Wojsk Lotniczych
- Tematy:
-
electrochemical impedance spectroscopy (EIS)
aluminium alloys
MIG welding
corrosion - Opis:
- The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by MIG were presented. In the article the parameters for MIG welding of sheets made of AlZn5Mg1 (7020) alloy was presented. Metallographic analysis of bonds showed a proper structural construction MIG welded 7020 aluminum alloy. EIS measurement was performed in three electrode system in artificial seawater (3.5% NaCl). Impedance studies were carried out at the corrosion potential. Changed voltage signal amplitude in the range plus or minus 10 mV and frequency range of changes was as follows: 100 kHz - 0.1 Hz. Atlas 0531 EU and IA potentiostat was used for studies. Model in the form of an electrical equivalent circuit replacement was chosen for the test object. The results of electrochemical impedance spectroscopy are presented graphically in the Nyquist charts matched with the theoretical curve to them and in the form of parameters characterizing the corrosion process. Obtained results were statistically analyzed. Much better resistance to electrochemical corrosion was found for the native material then joint welded by MIG of 7020 aluminum alloy. The most important parameter - charge transfer resistance value of a double layer Rct for sample of native material is higher than for the sample welded by MIG. Original value is received results of the corrosion properties of MIG welded AlZn5Mg1 alloy compared with the native material.
- Źródło:
-
Journal of KONES; 2012, 19, 1; 83-88
1231-4005
2354-0133 - Pojawia się w:
- Journal of KONES
- Dostawca treści:
- Biblioteka Nauki
Artykuł