Influence of bismuth on the corrosion of lead in 5 M H2SO4

✍ Scribed by M.J. Koop; D.F.A. Koch; D.A.J. Rand

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 511 KB
• Volume: 34
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(91)80102-4

✦ Synopsis

Bismuth exerts a dual influence on the corrosion of lead beneath the PbSO, film that is formed on the metal at applied potentials in sulphuric acid solution . First, by altering the morphology of the PbSO, crystals, bismuth (either alloyed with the metal, or dissolved in the acid) causes the development of a more porous film that promotes an increased attack of the underlying substrate . Second, bismuth modifies the grain structure of lead and this, in turn, determines the extent of corrosion under the PbSO, film .