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Inhibiting action of α-pyrophthalone in copper corrosion

✍ Scribed by G. Petkova; P. Ivanov; Prof. Dr. E. Sokolova; Prof. Dr. S. Raicheva

Book ID
102937096
Publisher
John Wiley and Sons
Year
1993
Tongue
German
Weight
940 KB
Volume
44
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The mechanism of the inhibiting action of α‐(pyridyl)‐1,3‐indandione (known as α‐pyrophthalone, αPP) in the corrosion of copper in nearly neutral solutions is studied by XPS analysis of the metal surface, capacitance and polarization measurements.

α‐Pyrophthalone decreases the rate of the cathodic as well as of the anodic partial reaction. The capacitance measurements show that the inhibitor's molecules adsorb on the copper surface at potential values more negative than that of the corrosion potential.

According to the data of the XPS analysis the inhibiting action of α‐pyrophthalone on the corrosion process is determined by the formation of a Cu(αPP)~2~‐complex on the copper surface. The composition and the structure of the inhibiting film show a complex process of the formation and the precipitation of the Cu(αPP)~2~‐complex on the surface.

📜 SIMILAR VOLUMES

Corrosion inhibitive action of zinc comp
Corrosion inhibitive action of zinc compounds
✍ Mayne, J. E. O. 📂 Article 📅 1949 🏛 Wiley (John Wiley & Sons) ⚖ 365 KB

## Abstract Lewis and Evans^1^ examined the corrosion of steel produced by drops of 0.001 M sodium chloride solution applied to a film of paint, which had been interrupted by the engraving of a standard scratch line. They found that zinc dust, zinc oxide and a number of lead compounds prevented cor