Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (12): 1455-1461.DOI: 10.11944/j.issn.1000-0518.2016.12.160086

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Electrochemical Behavior of Al/Pb-0.2%Ag Anode in Fluoride Ion and Sulfuric Acid

SONG Hongweia,HUANG Huiab*(),TAN Ningb,CHENG Bumingab,GUO Zhongchengab   

  1. aFaculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China
    bKunming Hengda Technology Co.,LTD,Kunming 650106,China
  • Received:2016-03-04 Accepted:2016-09-18 Published:2016-12-05 Online:2016-12-05
  • Contact: HUANG Hui
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.51504111), the Natural Science Foundation of Yunnan Province,China(No.20113FA012, No.20113FB022)

Abstract:

In order to study the electrochemical behavior of aluminum-lead-silver alloy anodes based on aluminum in the systems of containing fluoride ion and sulfuric acid. Testing cyclic voltammetry and galvanostatic polarization curves of Al/Pb-0.2%Ag anode in different concentrations of fluoride ion and sulfuric acid systems, respectively. The results show that oxidation and the reduction that tetravalence switch to bivalence of lead on the anode surface were inhibited, though the reduction tetravalence switch to simple substance of lead was promoted, and oxygen evolution reaction was inhibited while oxidation film-forming was promoted with increasing F- concentration. The oxidation and reduction of lead are increased at first then decreased with the increasing sulfuric acid concentration. They are the most favorable conditions for oxidation film-forming and oxygen evolution reaction of the anode at sulfuric acid and F- concentration of 20 g/L and 0.1 g/L.

Key words: Al/Pb-0.2%Ag anode, electrochemical behavior, oxidation film-forming, oxygen evolution reaction