caa a22 4500 463223918 CHVBK 20180405153221.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10853-006-0809-x doi (NATIONALLICENCE)springer-10.1007/s10853-006-0809-x A chemiometric approach for phosphate inhibition of copper corrosion in aqueous media [Elektronische Daten] [N. Souissi, E. Triki] The inhibition of copper corrosion in aqueous media by inorganic phosphates has been studied using a chemiometric approach (experimental and simplex designs). To achieve the objective, four steps were recognized. When submitted to aqueous aggressive media, the anion nature and its concentration were the important variables for the explanation of the mass loss variation. The most corrosive experimental conditions were: anion: chloride (Cl−); concentration: [Cl−]=1mol/l; exposure time: 24h. In the second step, two inorganic phosphates, Na3PO4 and Na5P3O10, are tested as copper corrosion inhibitors when the material is submitted to the severe conditions. The chemical structure was found to be the most influent factor. However, %IE varies between 25% and 56%. Then, we recognized a passivating treatment by submitting copper to inhibitor solution before immersion in the aggressive medium. Three parameters were studied: inhibitor structure, chemical concentration and passivation time (tp). We concluded that tp is the most influent experimental factor. The best passivating conditions are: inhibitor: Na5P3O10; inhibitor concentration: [Inhibiteur]=10−2mol/l and passivation time: 3h. The inhibition efficiency was 89%. To increase %IE, a simplex design was also performed starting by the above obtained conditions and using the polyphosphate (Na5P3O10) as inhibitor. The optimum experimental conditions for phosphate inhibition of copper corrosion in aqueous media are: inhibitor: Na5P3O10, [Na5P3O10]=0.017mol/l and passivation time tp=2.17h. Under these conditions an inhibition efficiency of 98% was reached. Springer Science+Business Media, LLC, 2007 Souissi N. Unité de Recherche "Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 32, 1002, Le Belvédère Tunis, Tunisia aut Triki E. Unité de Recherche "Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 32, 1002, Le Belvédère Tunis, Tunisia aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/9(2007-05-01), 3259-3265 0022-2461 42:9<3259 2007 42 10853 https://doi.org/10.1007/s10853-006-0809-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0809-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Souissi N. Unité de Recherche "Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 32, 1002, Le Belvédère Tunis, Tunisia aut NATIONALLICENCE 700 1- Triki E. Unité de Recherche "Corrosion & Protection des Métalliques”, École Nationale d'Ingénieurs de Tunis, BP 32, 1002, Le Belvédère Tunis, Tunisia aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/9(2007-05-01), 3259-3265 0022-2461 42:9<3259 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer