Effect of benzotriazole on surface processes during copper electrodissolution in sulfuric acid

• Published in: Journal of the Electrochemical Society Vol. 138; no. 1; pp. 25 - 33
• Main Authors: CLERC, C, ALKIRE, R
• Format: Journal Article
• Language: English
• Published: Pennington, NJ Electrochemical Society 1991
• Subjects: 360105 - Metals & Alloys- Corrosion & Erosion; 400400 - Electrochemistry; Applied sciences; AZOLES; CHEMICAL REACTIONS; CHEMISTRY; COPPER; CORROSION; Corrosion mechanisms; CORROSION PRODUCTS; DISSOLUTION; ELECTROCHEMICAL CORROSION; ELECTROCHEMISTRY; ELECTRODES; ELEMENTS; Exact sciences and technology; HETEROCYCLIC COMPOUNDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MATERIALS SCIENCE; METALS; Metals. Metallurgy; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; SULFURIC ACID; TRANSITION ELEMENTS; Theoretical model; Electrochemical corrosion; Surface layer; Anodic dissolution; Equivalent circuit; Surface film; Copper; Experimental study; Impedance; Benzotriazole; Corrosion inhibitor; Sulfuric acid

Impedance spectra were obtained during anodic dissolution of Cu in 0.5M H sub 2 SO sub 4 and 40mM benzotriazole (BTA) at 25 deg C. The spectra were evaluated according to the hypothesis that the electrode is covered with a barrier film having a stoichiometric composition through which the current is...