ISSN 2594-5327
65º Congresso ABM — vol. 65, num.65 (2010)
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Abstract
In this study, aluminum coatings were prepared by DC magnetron sputtering on AZ31B magnesium alloys. The influence of sputtering parameters (include sputtering current, argon pressure and deposition time) on corrosion behavior was investigated by potentiodynamic polarization tests in 3.5% NaCl solutions. The corrosion morphology was examined in detail by scanning electron microscopy (SEM) and macroscopic, respectively. It was found that the corrosion current density of magnesium alloys with aluminum coating on it was 2~3 orders of magnitude less than that of bare alloys. The corrosion potential with aluminum coating had been positive shift. The corrosion resistant properties of coatings were strongly affected by its structure and residual stress, which depended on the process condition. The severe corrosion will occur after aluminum coating damaged due to the interaction of galvanic corrosion and other corrosion form.
In this study, aluminum coatings were prepared by DC magnetron sputtering on AZ31B magnesium alloys. The influence of sputtering parameters (include sputtering current, argon pressure and deposition time) on corrosion behavior was investigated by potentiodynamic polarization tests in 3.5% NaCl solutions. The corrosion morphology was examined in detail by scanning electron microscopy (SEM) and macroscopic, respectively. It was found that the corrosion current density of magnesium alloys with aluminum coating on it was 2~3 orders of magnitude less than that of bare alloys. The corrosion potential with aluminum coating had been positive shift. The corrosion resistant properties of coatings were strongly affected by its structure and residual stress, which depended on the process condition. The severe corrosion will occur after aluminum coating damaged due to the interaction of galvanic corrosion and other corrosion form.
Keywords
Magnesium alloys; Magnetron sputtering; Aluminum coating; Corrosion resistance.
Magnesium alloys; Magnetron sputtering; Aluminum coating; Corrosion resistance.
How to refer
Zhang, Jin;
Yang, DongHua.
EFFECT OF ALUMINUM COATING BY MAGNETRON SPUTTERING ON CORROSION RESISTANCE OF MAGNESIUM ALLOYS
,
p. 3861-3869.
In: 65º Congresso ABM,
Rio de Janeiro,
2010.
ISSN: 2594-5327
, DOI 10.5151/2594-5327-16770
