Hi, I am a student currently working on new applications concerning filter elements which screens are in Stainless Steel 316L embed into a En-Ac 46000 frame. Of course, applications involving seawater involved galvanic corrosion and I would like to know if the use of a sacrificial anode would be sufficient to stop this corrosion and for how long. If it would not, would it exist another mean to stop or at least to limit this corrosion? Or would it be better to change the aluminium alloy maybe to use composites? Thanks for your help. H%E9l%E8ne.

Hi Mr Hendrix, EN-Ac 46000 is a an aluminium casting alloy also known as AlSi9Cu3 in ISO Normes. It contains 82.1% of aluminium, 8 %E0 10% of silicium, 2.7 %E0 3.7% of copper, 0.1 %E0 0.3% of magnesium and less than 1% of iron. This aluminium alloys is a pressure die cast alloy. If you need any other information don't hesitate to ask! Thanks for your help. H%E9l%E8ne

Mr Hendrix, First of all, thanks for answering so quickly ! When you say that " sacrificial anodes can prevent galvanic corrosion if the system is designed correctly" what do you mean exactly by "designed correctly" ? Has the sacrificial anode to be in contact with the alluminium? with the SS ? Or can it be put anywhere else ? Thanks for your help! H%E9l%E8ne.