An Investigation on Corrosion Resistance of Lead-free Bronze CAC905

Abstract

CAC 905 is a recently developed lead-free copper alloy composed of 15 Zn-2.5 Sn. In the present study, the corrosion resistance of CAC905 was evaluated and compared to the conventional lead-containing bronze CAC406 using salt water cyclic corrosion test CCT , salt water spray test SST as well as the corrosion test for determination of dezincification resistance. It was found that CAC905 has an equal corrosion resistance to CAC406. Dezincification phenomenon was not observed in CAC905. Polarization test showed that the polarization curves of CAC905 in 3 mass NaCl solution is similar to that of CAC406, supporting the corrosion test result that the corrosion resistance is almost the same for CAC905 and CAC406. SEM/EDS and XRD analyses conducted on CAC905 specimens after CCT for 240 hrs revealed that corrosion products of Zinc were deposited on the CAC905 alloy surface, which may depress the anodic reaction of CAC905 alloy.

Study on Softening Resistance of Cu-Sn-Fe-P alloy for Advanced Electrical Connectors

“…As a result, the subsequent working properties exhibit a noticeable enhancement. [11][12] . In Figure 5, the photos of the microstructure of alloy with different contents of Fe after heat preservation for 0.5h at different temperatures are shown.…”