MECHANISM OF ELECTROCHEMISTRY OF JAMESONITE/DDTC INTERFACE IN ACIDIC SOLUTION

J Chin Soc Corr Pro

2006, Vol. 26

Issue (3): 152-156 DOI:

Research Report

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MECHANISM OF ELECTROCHEMISTRY OF JAMESONITE/DDTC INTERFACE IN ACIDIC SOLUTION

Runlan Yu;Guanzhou QIU;Yuehua HU;Wenqing QIN

中南大学资源加工与生物工程学院大型仪器室

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Abstract Electrochemical behaviors on the surface of jamesonite in an acidic solution of pH4.0 buffer solution containing diethyl dithiocarbamate were investigated by the methods of cyclic voltammetry and AC impedance.The changes of the reactions,electrochemical adsorption,passivation action,electrochemical impedance and interfacial capacitance on jamesonite were discussed under the different conditions of electrode potentials.In the acidic solution,jamesonite is of a salt characteristics,and its electrode process kinetics is controlled by the electrochemical reactions and the adsorption of their productions.The hydrophobic adsorption film gradually grows and passivates on jamesonite from -78 mV to 42 2 mV.The electrode process of jamesonite at 522 mV is quite controlled by the reaction that is depended on ion diffusion.When the electrode potential is over 622 mV,the hydrophilicity on jamesonite becomes strong due to covering an amount of PbSO4 from the electrochemical reactions.

Key words: interface electrochemical chemistry jamesonite diethyl acidic solution potential

Received: 23 March 2005

ZTFLH:

TD923

Corresponding Authors: Runlan Yu E-mail: yrl715@sina.com

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Runlan Yu; Guanzhou QIU; Yuehua HU; Wenqing QIN. MECHANISM OF ELECTROCHEMISTRY OF JAMESONITE/DDTC INTERFACE IN ACIDIC SOLUTION. J Chin Soc Corr Pro, 2006, 26(3): 152-156 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2006/V26/I3/152

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