Intergranular and pitting corrosion mechanisms of sensitized aluminum alloy AA5083

Author

Clayton EglestonFollow

College

College of Engineering and Polymer Science

Date of Last Revision

2023-05-08 16:37:40

Major

Chemical Engineering

Honors Course

CHEE:497

Number of Credits

3

Degree Name

<-- Please Select One -->

Date of Expected Graduation

Spring 2023

Abstract

The motivation and objectives of this project is to examine the mechanisms of intergranular corrosion (IGC) and pitting corrosion of sensitized AA5083. In this regard, different characterization techniques were used, including optical analysis of microstructure, cyclic potentiodynamic polarization with Tafel fitting, electrochemical impedance spectroscopy with electrical equivalent circuit (EEC) fitting, and potentiostatic current transient monitoring. The transition from IGC to pitting corrosion occurs when the grain boundaries become saturated with the β-phase (Mg₂Al₃). It was found that AA5083 becomes more vulnerable to pitting corrosion as the degree of sensitization increases.

Research Sponsor

David Bastidas

First Reader

Jacob Ress

Second Reader

Roya Gitiafroz

Honors Faculty Advisor

Zhenmeng Peng

Proprietary and/or Confidential Information

No

Recommended Citation

Egleston, Clayton, "Intergranular and pitting corrosion mechanisms of sensitized aluminum alloy AA5083" (2023). Williams Honors College, Honors Research Projects. 1693.
https://ideaexchange.uakron.edu/honors_research_projects/1693