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The use of light-weight Al alloys in the automotive industry is increasing to meet requirements for fuelefficiency and emission reduction. Joining Al alloy to the conventional steel sheet is also very important issuewith the increased use of Al alloy, and several joining processes have been introduced to enhance joiningstrength between dissimilar metals. This paper deals with a galvanic corrosion in the dissimilar metaljoining. Salt spray tests up to 2000 hours were conducted on a self-piercing rivet, spot welded, adhesivebonded and weld-bonded joints, and cross-sections and tensile shear strength according the salt spray durationwere analyzed at every 500-hour. Self-piercing rivet joint had relative low initial strength but the jointstrength did not change regardless of the salt spray duration. The strength of other joints (spot welded, adhesivebonded and weld-bonded joints) decreased with the increase of salt spray duration and the corrosion behaviourof each joint was discussed.
