Experimental investigation of galvanic corrosion: Comparison between SVET and immersion techniques

In this work, two experimental techniques: (a) scanning vibrating electrode technique (SVET) and (b) immersion technique are used to calculate the corrosion rate of two galvanic couples, AE44 (Mg alloy) – mild steel and AE44 – AA6063 (Al alloy). The maximum corrosion rate estimated from these two widely different experimental techniques is found to be in a good agreement for both couples considered here. The maximum corrosion rate of AE44 in AE44 – mild steel couple is found to be approximately five times higher than that in AE44 – AA6063.