TY - JOUR
T1 - Corrosion behavior in aluminum/galvanized steel resistance spot welds and self-piercing riveting joints in salt spray environment
AU - Pan, Bo
AU - Sun, Hui
AU - Shang, Shun Li
AU - Wen, Weiling
AU - Banu, Mihaela
AU - Simmer, Joseph C.
AU - Carlson, Blair E.
AU - Chen, Nannan
AU - Liu, Zi Kui
AU - Zheng, Zhuoyuan
AU - Wang, Pingfeng
AU - Li, Jingjing
N1 - Publisher Copyright:
© 2021 The Society of Manufacturing Engineers
PY - 2021/10
Y1 - 2021/10
N2 - This paper underlined the corrosion behavior of aluminum alloy/galvanized steel joints fabricated by resistance spot welding (RSW) and self-piercing riveting (SPR) exposed to different salt-spray cycles. It was found that the crevice generated by different joining methods has an important impact on corrosion behavior. Compared with the RSW joint, less corrosion happened on the coupled regions in SPR joints because of the higher local pH value resulted from the smaller crevice. The crevice, however, has less impact on the types of corrosion products. Galvanic corrosion happened in the coupled region for both RSW and SPR joints. The Pourbaix diagram explained the stable corrosion products of Al and Zn[sbnd]Fe alloy, which are Al2O3, ZnO, and Fe3O4. Additional corrosion products observed from the experiment included α-Al(OH)3, Ca4Al2(CO3)(OH)12(H2O)5, Zn5(OH)8Cl2(H2O), Zn5(CO3)2(OH)6, and Fe2(OH)2(CO3), which can be understood by considering the metastable corrosion products, Pourbaix diagram, and possible chemical reactions.
AB - This paper underlined the corrosion behavior of aluminum alloy/galvanized steel joints fabricated by resistance spot welding (RSW) and self-piercing riveting (SPR) exposed to different salt-spray cycles. It was found that the crevice generated by different joining methods has an important impact on corrosion behavior. Compared with the RSW joint, less corrosion happened on the coupled regions in SPR joints because of the higher local pH value resulted from the smaller crevice. The crevice, however, has less impact on the types of corrosion products. Galvanic corrosion happened in the coupled region for both RSW and SPR joints. The Pourbaix diagram explained the stable corrosion products of Al and Zn[sbnd]Fe alloy, which are Al2O3, ZnO, and Fe3O4. Additional corrosion products observed from the experiment included α-Al(OH)3, Ca4Al2(CO3)(OH)12(H2O)5, Zn5(OH)8Cl2(H2O), Zn5(CO3)2(OH)6, and Fe2(OH)2(CO3), which can be understood by considering the metastable corrosion products, Pourbaix diagram, and possible chemical reactions.
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U2 - 10.1016/j.jmapro.2021.08.052
DO - 10.1016/j.jmapro.2021.08.052
M3 - Article
AN - SCOPUS:85114933941
SN - 1526-6125
VL - 70
SP - 608
EP - 620
JO - Journal of Manufacturing Processes
JF - Journal of Manufacturing Processes
ER -