Acta Phys. -Chim. Sin. ›› 1994, Vol. 10 ›› Issue (03): 204-211.doi: 10.3866/PKU.WHXB19940304

• ARTICLE • Previous Articles     Next Articles

Investigation on the Transient Current Response to Potential Pulse for an Electrochemical System with High Impedence

Song Guang-Ling, Cao Chu-Nan, Shi Zhi-Ming, Lin Hai-Chao   

  1. Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals, Chinese Academy of Sciences, Shenyang 110015
  • Received:1992-08-31 Revised:1992-12-18 Published:1994-03-15
  • Contact: Song Guang-Ling

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Abstract:

A new technique of current transient response to a potential square-wave pulse was developed. Based on the technique, the disturbation of noise which is mixed with real signal can be effectively reduced by accumulation process in the current transient response, and the time constant of the electrochemical system can also be easily deter mined by plotting non-equidistance-differential-plot. Besides these, the amplitude of the potential pulse and the solution resistance of electrochemical system as well as their roles in improving "signal/noise" ratio of transient process were discussed, and Fe/(H_3BO_3+Na_2B_4O_7) and steel/sand clay corrosion systems measured to verify the new devel-oped method.

Key words: Electrochemistry, Transient process, Current response, Square-wave pulse