SciELO - Scientific Electronic Library Online

 
vol.46 número4"OXIDATION-REDUCTION POTENTIAL (ORP) IN PREPARED AND INDUSTRIALLY TREATED WATERS"FIRST X-RAY CRYSTAL STRUCTURE OF A BIMETALLIC COMPLEX CONTAINING A p -COORDINATED HYDRAZONE: [(h 5-Cp)Fe(h 6-p-MeOC6H4)-NHN=CH-(h 5-C5H4)Fe(h 5-Cp)]+PF6 índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Boletín de la Sociedad Chilena de Química

versão impressa ISSN 0366-1644

Resumo

SEPULVEDA, Y. et al. ANODIZING OF Al 2024-T3 IN MIXTURES OF SULPHURIC-BORIC ACIDS. Bol. Soc. Chil. Quím. [online]. 2001, vol.46, n.4, pp.399-407. ISSN 0366-1644.  http://dx.doi.org/10.4067/S0366-16442001000400003.

The influence of boric acid, at concentrations of 0.1 and 0.5 M, on anodizing Al 2024-T3 at constant current density in 0.5 M sulphuric acid electrolyte, has been investigated. From the voltage time responses and oxide thicknesses measurements after 30 min anodizing, addition of boric acid has negligible effects on the general anodizing behavior of the alloy. However, in the initial stages of anodizing, the presence of boric acid in the electrolyte strongly reduces the occurrence of secondary electrochemical reactions, consuming electrical charge, consequently increasing the initial efficiency for anodic oxide formation. The effect of boric acid in the initial stages of anodizing the alloy is attributed mainly to the inhibition of oxygen evolution on CuAl2 particles by precipitation of partially or, totally dehydrated boron oxide

Palavras-chave : aluminum alloy; anodic films; anodizing, boric acid.

        · resumo em Espanhol     · texto em Espanhol

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons