抄録
The tests of galvanic anodes for cathodic protection were conducted on materials of Al-Zn, Al-Sn, Al-Cd, and Al-Zn-Sn alloys in an artificial seawater by using an apparatus for galvanostatic electrolysis. Corrosion aspects of the test pieces after 10-day immersion were analyzed by X-ray diffraction patterns and discussed by Hansen's Constitutional Diagram of Binary Alloys. The following conclusions were deduced from the change in anodic potential of aluminum alloys during 10 days and the current efficiency after that period: (1) Among Al-Zn alloys, Al-Zn (5.0-10.0) alloys showed good results. (2) None of Al-Sn and Al-Cd alloys were promising. (3) Among Al-Zn-Sn alloys, Al-Zn(3.0)-Sn (0.5) alloy and Al-Zn(3.0)-Sn (1.0) alloy had the best results.
