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Titolo:
OXIDATION PROCESSES OF LEAD SULFATE IN TH E ANODIC FILMS ON PURE AND ANTIMONIAL LEAD
Autore:
WEI GL; CHEN XL; ZHOU WF;
Indirizzi:
SHANGHAI UNIV SCI & TECHNOL,DEPT CHEM SHANGHAI 201800 PEOPLES R CHINA FUDAN UNIV,DEPT CHEM SHANGHAI 200433 PEOPLES R CHINA
Titolo Testata:
Huaxue xuebao
fascicolo: 4, volume: 53, anno: 1995,
pagine: 313 - 317
SICI:
0567-7351(1995)53:4<313:OPOLSI>2.0.ZU;2-2
Fonte:
ISI
Lingua:
CHI
Soggetto:
SULFURIC-ACID; SULFATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
8
Recensione:
Indirizzi per estratti:
Citazione:
G.L. Wei et al., "OXIDATION PROCESSES OF LEAD SULFATE IN TH E ANODIC FILMS ON PURE AND ANTIMONIAL LEAD", Huaxue xuebao, 53(4), 1995, pp. 313-317

Abstract

The oxidation processes of lead sulphate in the anodic films on lead and Pb-5wt% Sb alloy, which were formed by the reduction at 0.9 V (vs. Hg / Hg2SO4, the same reference electrode below) for 5 min of the anodic films grown in a 4.5 mol . dm(-3) H2SO4 solution (30 degrees C) at1.3 V for 20 min, have been studied using potential. step and a.c. impedance methods respectively. The experimental results show that the lead sulphate, which is formed by reducing lead dioxide, can be reoxidized to lead dioxide within 1 min at 1.4 V. This is due to the fact that this kind of lead sulphate is at the surface layers of the lead sulphate grains in the anodic film, The oxidation process of lead sulphatein the inner part of the grain, which is formed directly by anodizinglead, is much slower. The antimony in the lead alloy inhibits significantly the nucleation and growth of lead dioxide crystals,

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 09:58:32