Galvanic Corrosion Behavior Between 5083 Aluminium Alloy and 2205 Stainless Ateel

The galvanic potential and current between 5083 aluminium alloy and 2205 stainless steel in seawater of Qingdao offshore were studied . The results showed that due to the big potential difference, an obvious galvanic corrosion between these two types of materials in natural seawater occured. Whether the surface area of 5083 Al alloy was small or not, its corrosion rate was accelerated, at the same time the 2205 steel was protected. So, it should be avoided for these two materials to contact directly in seawater.