Chloride-Assisted Corrosion of Copper and Protection by Benzotriazole
Source abstract
Abstract
The structure and composition of copper surfaces in aqueous solutions of benzotriazole (BTAH) and NaCl was investigated by sum frequency vibrational spectroscopy as a function of concentration and bias during cyclic voltammetry experiments. We found that the protection provided by the BTAH films formed at the copper surface is effective for negative bias voltages below the open circuit potential (OCP) but not at positive voltages where Cl– displaces BTAH. By measuring the Gibbs adsorption energy of BTAH and Cl–, we found that a particularly stable Cl– structure is formed around the OCP, suggesting that electronegative additives that move the OCP to higher negative values can improve BTAH protection, which we confirmed by the addition of a negatively charged sodium dodecyl sulfate surfactant.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · Electrochemical Analysis and Applications · Analytical chemistry methods development
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Department of Materials Science and Engineering, University of California-Berkeley, Berkeley, California 94720, United States
Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
NASA Ames Research Center, Moffett Field, California 94035, United States
Molecular Foundry Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Funding
Basic Energy Sciences · National Science Foundation · Lawrence Berkeley National Laboratory
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