【摘要】 根据热力学数据,通过计算绘制出Pb-H₂O系E-pH图,分析了酸性和碱性条件下电沉积二氧化铅的可行性。研究表明:温度对碱性电沉积二氧化铅电位的影响比酸性的大。在酸性镀液中,提高氧的超电位抑制氧气的析出,可得到较均匀的二氧化铅镀层;在碱性条件下,减小电流密度或降低一定的槽电压能得到光滑致密的镀层。物相分析证实,碱性电沉积二氧化铅的镀层为α-PbO₂,酸性电沉积二氧化铅的镀层为β-PbO₂。更多还原

【Abstract】 In order to the thermodynamic data,the E-pH diagram of Pb-H₂O system were calculated and drawn, and the feasibility of electrodepositing PbO₂ from aqueous solution and acid solution was discussed in this paper. The results showed that the potential of electrodeposited PbO₂ from the aqueous media was easier influence by temperature.In acid system,the uniformly PbO₂-coating can been obtained by properly increasing the over-potential to restrain oxygen-evolution.In aqueous system,we can get smooth and compact PbO₂ layer by reducing the current density and working voltage of the electrolytic cell.The phase analysis result showed,we can getα-PbO₂ coatings if electrndeposited PbO₂ from the aqueous solution,andβ-PbO₂ coatings if electrodeposited PbO₂ from the acid solution.更多还原