CORROSION RESISTANCE IMPROVEMENT OF 7075 AL ALLOY BY PLASMA ELECTROLYTIC OXIDATION

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BAHRAMIAN A.; RAEISSI K.; HAKIMIZAD A.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2015 | Volume:11 | Issue:24 Page(s): 61-71

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Title

CORROSION RESISTANCE IMPROVEMENT OF 7075 AL ALLOY BY PLASMA ELECTROLYTIC OXIDATION

Author(s)

BAHRAMIAN A. | RAEISSI K. | HAKIMIZAD A. | Issue Writer Certificate

Keywords

7075 ALUMINUM ALLOYQ2

COATINGQ2

PLASMA ELECTROLYTIC OXIDATIONQ2

CORROSION BEHAVIORQ2

Abstract

Plasma Electrolytic Oxidation (PEO) method was employed to enhance corrosion resistance of 7075 ALUMINUM ALLOY. The COATING process carried out in a silicate based electrolyte by DC constant current density. Characteristics of COATING were evaluated by X-ray diffraction and scanning electron microscopy methods. Analysis showed the formation of g-alumina oxide film, which has a porous surface and some pores in its structure. COATING CORROSION BEHAVIOR was evaluated by electrochemical tests after 1 hour immersion in 1M H2SO4. Tafel Polarization test revealed that PEO decreased the corrosion current density as ten orders of magnitude, and increased the charge-transfer resistance as twenty five order of magnitude, and thus improved corrosion resistance of 7075 Al alloy. Electrochemical Impedance spectroscopy (EIS) test revealed that the COATING formed a physical barrier against the charge transfer, and decreased the diffusion rate of the corrosive solution due to its non-columnar structure.

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APA: Copy

BAHRAMIAN, A., RAEISSI, K., & HAKIMIZAD, A.. (2015). CORROSION RESISTANCE IMPROVEMENT OF 7075 AL ALLOY BY PLASMA ELECTROLYTIC OXIDATION. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, 11(24), 61-71. SID. https://sid.ir/paper/121029/en

Vancouver: Copy

BAHRAMIAN A., RAEISSI K., HAKIMIZAD A.. CORROSION RESISTANCE IMPROVEMENT OF 7075 AL ALLOY BY PLASMA ELECTROLYTIC OXIDATION. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2015;11(24):61-71. Available from: https://sid.ir/paper/121029/en

IEEE: Copy

A. BAHRAMIAN, K. RAEISSI, and A. HAKIMIZAD, “CORROSION RESISTANCE IMPROVEMENT OF 7075 AL ALLOY BY PLASMA ELECTROLYTIC OXIDATION,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. 11, no. 24, pp. 61–71, 2015, [Online]. Available: https://sid.ir/paper/121029/en

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