Effects of lanthanum on the microstructure, electrochemical behavior, and anti‐corrosion properties of zinc–copper–titanium alloy in 3% sodium chloride solution

Abstract

SEM analysis shows that trace amounts of La in Zn-Cu-Ti alloy can eliminate dendritic segregation and produce uniform organization. Analyses of Tafel polarization curves and EIS show that La can obviously improve the corrosion resistance of Zn-Cu-Ti alloy by two features: (i) La oxide film has strong barrier properties; (ii) with an increase in La content, the thick skeletal dendrite e primary crystal phase disappears and the more refined and dispersed e II phase is generated, leading to a decrease in the active cathode area. Zn-Cu-Ti-0.5La alloy has the best corrosion resistance. The corrosion of the investigated alloys is mainly selective.

Facile synthesis of ZnOHF/ZIF‐8 composite coating for corrosion protection of Zn–Cu–Ti alloy

“…Many micrometers with nanosheet structure are distributed unevenly on the surface of the corroded Zn alloy (Figure 3b, c). Wang and Ji reported similar results in corrosion experiment of Zn–Cu–Ti alloy [1, 4]. It is measured that its thickness of corrosion layer is about 67μm (Figure 3d).…”

“…The phase and shape of corrosion products and corrosion layer thickness of the bare and treated alloys were characterized after 8 days of immersion in 3.5% NaCl solution, as shown in 3b, c). Wang and Ji reported similar results in corrosion experiment of Zn-Cu-Ti alloy [1,4]. It is measured that its thickness of corrosion layer is about 67μm (Figure 3d).…”

“…Much work has been performed on the corrosion behaviour of Zn-Cu-Ti alloys [1,2]. Many researchers indicated that elemental alloying can improve corrosion resistance of Zn-Cu-Ti alloys [3,4].…”