Copper Stainless Steel Reaction

Iron and steel are generally not a problem unless their mass is similar or smaller than that of the copper.

Copper stainless steel reaction.

There are three commonly used metals for potable water plumbing pipes including stainless steel copper and brass. Any corrosion product if washed onto stainless steel may however result in problems not associated with the bi metallic effect and so not be predicted from the tables. The elbows must be permanently joined to one frame member at each knock down joint. In addition the area ratio of stainless steel to copper altered copper corrosion behavior.

In the copper stainless steel couple the open circuit potential of stainless steel was found to play a decisive role. Lead and copper are quite close on the nobility table to stainless steel and so the bimetallic corrosion risks should be small. It is not necessary to isolate copper from lead tin or stainless steel under most circumstances. The principal metals of concern in terms of direct contact are aluminum and zinc.

These metals are used because of their durability and long lifespans. In most cases when stainless steel was in the passive state and acted as the cathode the contact accelerated copper corrosion. I wish to use hard copper elbows to join aluminum tube frame members. Corrosion issues with aluminum copper and stainless steel 2004.

If copper is connected to stainless steel type 304 then the copper will corrode to sacrifice to the stainless steel.