Date on Master's Thesis/Doctoral Dissertation

7-2021

Document Type

Master's Thesis

Degree Name

M. Eng.

Department

Chemical Engineering

Degree Program

Chemical Engineering, MS

Committee Chair

Gupta, Gautam

Committee Member

Ghorbanian, Mahyar

Committee Member

Atre, Sundar

Author's Keywords

corrosion; copper; impedance; electrochemistry

Abstract

The purpose of this study was to discover and thoroughly explain the corrosion mechanisms of copper in saltwater, tap water and deionized water, and to apply these methods and findings when testing the corrosion mechanisms of other materials. The experimental procedure consisted of measuring the open circuit potential, electrochemical impedance spectroscopy, linear sweep voltammetry, and Tafel analysis.

The copper was found to corrode at a greater rate in saltwater, followed by tap water then deionized water, with a larger difference between saltwater and tap water than between tap water and deionized water. Each reaction was found to be both kinetically and diffusion controlled.

Similar experiments were conducted using stainless steel immersed in mock wastewater, and 3D printed stainless steel in saltwater. Corrosion rates increased as the concentration of the mock wastewater increased. The 3D printed stainless steel had corrosion rates 200 times less than those of copper in saltwater solution.

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