Affiliation:
1. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
2. School of Metallurgy Northeastern University Shenyang China
3. Corrosion and Protection Center The University of Science and Technology Beijing Beijing China
4. Department of Materials Science and Engineering The University of California at Berkeley California Berkeley USA
Abstract
AbstractThe passivity of pure copper over a wide pH range has been explored using potentiodynamic and potentiostatic polarization, Mott–Schottky analysis, and electrochemical impedance spectroscopy (EIS). The study shows that the passive film is a p‐type semiconductor. The natural logarithm of the passive current density is found to linearly increase with the film formation potential. The passive state of copper is interpreted by optimizing the point defect model (PDM) on the EIS data. Kinetic stability diagrams are derived for pure copper in borate buffer based on the rate law for passive film growth in accordance with the PDM.
Subject
Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry,Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry,Materials Chemistry,Metals and Alloys,Surfaces, Coatings and Films,Mechanical Engineering,Mechanics of Materials,Environmental Chemistry