Auger electron spectroscopy

Geochemistry

Carbon steel

Composite number

Mathematical physics

Weathering

Electrochemistry

Metallurgy

Materials science

Geomorphology

Weathering steel

Nuclear physics

Computer science

Carbon fibers

Earth (classical element)

Rust (programming language)

Geology

Physical chemistry

Physics

Electron microprobe

Composite material

Corrosion

Chemistry

Programming language

Scanning electron microscope

Electrode

Rare earth

Materials and Corrosion

The effects of rare earth elements on the corrosion properties of low‐carbon steel and weathering steel were investigated. To elucidate the roles of rare earth elements (Ce and La) and the corrosion behavior of steels, salt spray tests, electrochemical techniques, X‐ray diffractometer, scanning electron microscopy, Electron Probe Micro Analysis (EPMA), and Auger Electron Spectroscopy (AES) were conducted. The results showed that the addition of rare earth elements enhances the corrosion resistance of both low‐carbon steels and weathering steels, indicated by lower corrosion current density and salt spray corrosion rate after rare earth alloying. On the one hand, rare earth elements modify the morphology of inclusions and thus slow down the micro‐area electrochemical corrosion, which improves the electrochemical corrosion resistance of these two steels. On the other hand, rare earth atoms tend to segregate toward the interface between the rust layer and the matrix. Hence, salt spray corrosion resistance is improved due to the enhancement of adhesion and compactness of the rust by the addition of rare earth elements.

Effects of rare earth elements on corrosion behaviors of low‐carbon steels and weathering steels