A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data
The passivation and localized corrosion of α-, β-, and (α + β)-brass in borate-boric acid buffer solutions (pH 9) containing different NaCl concentrations (c<sub>NaCl</sub>) were studied comparatively using conventional electrochemical techniques at 25 °C. The passivation of brass in bor...
| Autores principales: | , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1995
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/80404 |
| Aporte de: |
| id |
I19-R120-10915-80404 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Química Boratos Cloruro de Sodio Electroquímica Corrosión Boricum Acidum Ácidos Bóricos Técnicas Electroquímicas |
| spellingShingle |
Ciencias Exactas Química Boratos Cloruro de Sodio Electroquímica Corrosión Boricum Acidum Ácidos Bóricos Técnicas Electroquímicas Morales, Jose Carlos Fernández, Guillermina T. Esparza, Pedro González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data |
| topic_facet |
Ciencias Exactas Química Boratos Cloruro de Sodio Electroquímica Corrosión Boricum Acidum Ácidos Bóricos Técnicas Electroquímicas |
| description |
The passivation and localized corrosion of α-, β-, and (α + β)-brass in borate-boric acid buffer solutions (pH 9) containing different NaCl concentrations (c<sub>NaCl</sub>) were studied comparatively using conventional electrochemical techniques at 25 °C. The passivation of brass in borate-boric acid buffer was due to the electroformation of a complex passive layer consisting of ZnO · xH<sub>2</sub>O and Cu<sub>2</sub>O—CuO. In NaCl-containing borate-boric acid buffer the breakdown of the passive layer occurs leading to pitting corrosion when the applied potential exceeds a certain critical value, E<sub>b</sub>. For a given type of brass, the value of E<sub>b</sub> is shifted negatively as c<sub>NaCl</sub> is increased. At a constant c<sub>NaCl</sub> the localized corrosion resistance of brass increases in the following order (α + β)-brass ≅ β-brass < α-brass. For all brass the localized corrosion resistance was lower than that of polycrystalline Cu, but considerably greater than that of polycrystalline Zn. Passive film composition and de-alloying can account for the localized corrosion resistance of these alloys. |
| format |
Articulo Articulo |
| author |
Morales, Jose Carlos Fernández, Guillermina T. Esparza, Pedro González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_facet |
Morales, Jose Carlos Fernández, Guillermina T. Esparza, Pedro González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge |
| author_sort |
Morales, Jose Carlos |
| title |
A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data |
| title_short |
A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data |
| title_full |
A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data |
| title_fullStr |
A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data |
| title_full_unstemmed |
A comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : I. Electrochemical data |
| title_sort |
comparative study on the passivation and localized corrosion of α, β, and α + β brass in borate buffer solutions containing sodium chloride : i. electrochemical data |
| publishDate |
1995 |
| url |
http://sedici.unlp.edu.ar/handle/10915/80404 |
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Repositorios |
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1764820486929252352 |