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Study of corrosion behavior of aluminum brass with rare-earth in NaCl solution

Dezhi Zhang

Abstract

An inhibited brass with arsenic free was designed.The corrosion resistance and corrosion behavior of the alloy in NaCl(3.5%)solution were studied by means of weight loss measurement,electrochemical testing,X-ray diffraction analysis(XRD),scanning electron microscopy and energy dispersive X-ray analysis(SEM-EDX).The results show that the rare-earth element in the alloy can promote formation of corrosion film,increase polarization resistance and inhibit the corrosion process as the alloy in NaCl(3.5%) solution.The corrosion resistance of HAl77-2-Re alloy is higher than that of the HAl77-2 alloy with arsenic.

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Key concepts: Corrosion, Alloy, Materials science, Brass, Scanning electron microscope, Metallurgy, Aluminium, Polarization (electrochemistry)