Corrosion of copper in acetic acid solutions
Abstract
Corrosion of copper in acetic acid solutions freely aerated by air was studied depending on its concentration and the duration of contact of the metal with an aggressive medium. There are no fundamental differences in the aggressiveness of this medium with respect to copper in the transition from static to dynamic experimental conditions. Aggressiveness of the studied media in relation to metallic copper increases the accumulation of the corrosion product in them, Cu(II) acetate. This effect is most pronounced when metallic copper comes into contact with a dynamic corrosive medium. A mixture of quaternary ammonium salts (catamine AB) and a triazole derivative (IFKhAN-92) were studied as copper corrosion inhibitors in acetic acid solutions. The highest protective effect is provided by the additive IFKhAN-92. The effectiveness of this inhibitor does not significantly depend on the duration of contact of the metal with the aggressive medium, the content of H3CCOOH in it, and the hydrodynamic characteristics of the solution. The IFKhAN-92 inhibitor retains its protective action against metallic copper even in the case of accumulation of a corrosion product, Cu(II) acetate, in a corrosive environment. It is important that this effect is preserved when moving from static to dynamic environments. The influence of the convective factor on the corrosion of copper in an acetic acid solution containing Cu(II) acetate, both in the absence and presence of corrosion inhibitors, is considered.
About the Authors
Ya. G. Avdeev
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninskii pr. 31, 119071, Moscow
K. L. Anfilov
Bauman Moscow State Technical University (Kaluga Branch)
Russian Federation
Russian Federation
Bazhenov str. 2, 248000, Kaluga
Yu. I. Kuznetsov
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Leninskii pr. 31, 119071, Moscow
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Avdeev Ya.G., Anfilov K.L., Kuznetsov Yu.I. Corrosion of copper in acetic acid solutions. Title in english. 2023;(1):56-69. (In Russ.)
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