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http://dx.doi.org/10.14773/cst.2017.16.3.128

Study on Prevention of Galvanic Corrosion between Carbon Steel Rivets and Graphite Used in Aluminum Matrix Automobiles  

Seo, Dong-Il (School of Advanced Materials Engineering, Kookmin University)
Lee, Jae-Bong (School of Advanced Materials Engineering, Kookmin University)
Publication Information
Corrosion Science and Technology / v.16, no.3, 2017 , pp. 128-140 More about this Journal
Abstract
Aluminum alloy matrix may be used for manufacturing lighter automobiles. However, galvanic corrosion may occur between the rivet joint combining aluminum alloy matrix and a CFRP (carbon fiber reinforced plastic) laminate. The possibility of galvanic corrosion may be investigated by measuring galvanic couple currents. Two types of galvanic current measuring methods were used. One method is to use potentiodynamic polarization curves and the other is the ZRA (zero resistance ammeter) method. For galvanic corrosion experiments graphite, a major component of CFRP, was used with carbon steel (rivets) and 6061 aluminum alloys. Regardless of carbon steel, Ni deposited carbon steel, and 316L stainless steels we also investigated the possibility of reduction in galvanic corrosion. Results revealed that even though Ni deposited carbon steel or 316L stainless rivet may slightly increase galvanic current density between those and Al matrix, substitute rivets for carbon steel may be considerably useful for reducing overall galvanic corrosion.
Keywords
galvanic corrosion; graphite; nickel; electrodeposition; SS316L;
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