As the important accessories of seawater pipes system,
seawater pump and valve usually made of tin bronze and silicon brass
were not able to meet the high reliability requirement for seawater pipes, because they were liable to serious electric coupling corrosion as they were coupled with the currently popularized B10 alloy in sea water. Thus a new type Ni Al bronze alloy was developed as the
seawater pump and valve material matching the B10 alloy as the seawater pipe material. The
electric couple corrosion behaviors of the newly developed Ni Al bronze alloy and conventional seawater pump and valve alloys coupled with B10 and B30 alloys in seawater were investigated, based on the measurement of the electric couple current, electric couple potential, and electric couple corrosion rate. It was found that the newly developed Ni Al bronze alloy coupled with B10 and B30 alloys in seawater had better ability to resist electric couple corrosion than the conventional tin bronze and silicon brass alloys.