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| THE THEORETICAL DERIVATION OF POLARIZATION POTENTIAL RESPONSE EQUATION OF COATED METAL SYSTEMS UNDER COULOSTATIC PERTURBATION |
| Zhao Changjiu Chen Fancai Chen Xune (Hunan University) |
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Abstract Under coulostatic perturbation,the transition process may be described by a group of linear differential equations,The key of deriving the equations is to determine the value of start condition. At the moment of coulostatic perturbation,the mechanism of tran- sition process for existing solution resistance is different from that of neglecting solution resistance,hence the polarization potenial change with time varies correspondingly.With the existance of solution resis- tance,the transport of charge can not complete instantaneously and the polarization potential can not change abruptly. On neglecting the influence of solution resistance,based on the law of Killkoff,the polarization potential must abruptly change at the moment of coulostatic perturbation.At the same time the circuit must be controlled by coulostat. Regardlessly at the moment of abrupt change or during all process of transport charge the constant theorem of charge must be obeyed. Thus we can set up the start condition of the transition process and derive the equations of polarization potential decay curve under cou- lostatic perturbation.
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Received: 25 August 1990
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