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Titolo:
Corrosion inhibition of different metal pigments in aqueous alkaline media
Autore:
Muller, B;
Indirizzi:
Fachhsch Esslingen, Hsch Tech Chem Ingenieurwesen Farbe Lack Umwelt, D-73728 Essen, Germany Fachhsch Esslingen Essen Germany D-73728 Umwelt, D-73728 Essen, Germany
Titolo Testata:
CORROSION SCIENCE
fascicolo: 6, volume: 43, anno: 2001,
pagine: 1155 - 1164
SICI:
0010-938X(200106)43:6<1155:CIODMP>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALUMINUM;
Keywords:
aluminium; zinc; copper; brass; gas volumetric measurements;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Muller, B Fachhsch Esslingen, Hsch Tech Chem Ingenieurwesen Farbe Lack Umwelt, Kanalstr 33, D-73728 Essen, Germany Fachhsch Esslingen Kanalstr 33 Essen Germany D-73728 n, Germany
Citazione:
B. Muller, "Corrosion inhibition of different metal pigments in aqueous alkaline media", CORROS SCI, 43(6), 2001, pp. 1155-1164

Abstract

In aqueous alkaline media aluminium and zinc pigments react with the evolution of hydrogen whereas the more noble copper and brass pigments react by the absorption of oxygen. All these different corrosion reactions can be inhibited with addition of the chelating agent 2-hydroxy benzoic acid (2-HBA). So, 2-HBA works in a reducing hydrogen atmosphere as well as in an oxidizing oxygen atmosphere. In contrast. the chelating I-mercapto benzoic acid only inhibited the hydrogen evolution of zinc pigment. which can be explained with "Pearson's principle of hard and soft acids acid bases". The non-chelating 4-hydroxy benzoic acid only inhibited the oxygen absorption of copper and brass pigments. So. For aluminium pigment chelation seems to be a basic requirement for corrosion inhibition whereas for copper and brass pigments chelation is not essential. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 18:11:30