<報文>塩素イオン, フッ素イオンを含む硫酸溶液中のPb-Ag2元合金のアノード挙動

概要

論文の詳細を見る
The polarization behavior of Pb-Ag (up to 1 wt% Ag) alloy anodes was determined in sulfuric acid solutions (H_2SO_4,150g/l) in the presence of Cl^- or F^-. The results are summarized as follows : 1) Cl^- and F^- significantly affect the variation of electrode potential with time over the first few hours of anodic polarization. 2) The presence of Cl^- or F^- results in higher electrode potential than that in the solution without halogen ion present. This effect was more pronounced for the rapidly solidified alloys than the slowly solidified ones. Cl^- and F^- reduce one of the most outstanding benefits provided by alloying of Ag in Pb, i. e. lowering the electrode potential. 3) The electrode potential increased only slightly with an increasing concentration of Cl^-, whereas, in the presence of F^- in the electrolyte, a maximum potential appeared at about 20mg F^-/l for the alloy of low Ag content and at about 50mg F^-/l for the alloy of higher Ag content. 4) Both halogen ions in the electrolyte suppress growth of β-PbO_2 crystal in the anodic oxide layer.lead-silver alloy anodehalogen ionβ-lead dioxideanodic oxide layer
東北大学の論文
1988-03-25