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Inhibiting the dissolution of zinc and magnesium alloys in acid emulsions

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Soviet materials science : a transl. of Fiziko-khimicheskaya mekhanika materialov / Academy of Sciences of the Ukrainian SSR Aims and scope

Abstract

The mechanism of the corrosion-inhibiting action at the edges of printing elements during emulsion etching was studied. It was shown that surface-active substances (SAS) used as inhibitors in emulsion etching become adsorbed on zinc and magnesium alloys by a physical mechanism, i. e., due to electrostatic attraction of organic anions by positively charged metal surfaces. When alloys of this kind are in contact with an emulsion of a hydrocarbon in nitric acid containing SAS, polymolecular micellar adsorbed films of the SAS-hydrocarbon type are formed on their surface. In the case of low surface charges these films are mobile and, being shifted onto the edges of printing elements under the pressure exerted by the flow of an emulsion, inhibit their corrosion. High surface charges lead to the formation of dense immobile adsorbed films which inhibit the corrosion of the entire alloy surface.

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Authors and Affiliations

  1. Institute of Physics and Mechanics AS UkrSSR, L'vov

    L. N. Petrov

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  1. L. N. Petrov
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Petrov, L.N. Inhibiting the dissolution of zinc and magnesium alloys in acid emulsions. Mater Sci 5, 31–35 (1972). https://doi.org/10.1007/BF00721304

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  • DOI: https://doi.org/10.1007/BF00721304

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