层流平板内嵌氯化银电极模型的电位研究

Potential Study of Silver Chloride Electrode Model Embedded in Laminar Flow Plate

在船体外加电流阴极保护系统中,常用氯化银电极作为参比电极,氯化银参比电极固定在船体表面,可等效为平板内嵌电极模型。由于动海水中氯化银参比电极电位特性涉及多方面的特点,其电位特性是目前研究的重点之一。为了探究动海水中氯化银参比电极与海水流速的关系,以平板内嵌电极模型为研究对象,并进行了海水流速与氯化银电极表面的银离子浓度、电极的位置、电流密度、电极电位等影响因素的仿真。仿真结果表明:在层流场内,海水流速越大,平板内嵌电极电位越小,而在平板内嵌电极表面反应产生的电流密度与极限电流密度越大,电位区间在0.36mV~0.48mV。

Silver chloride electrode is often used as reference electrode in ship impressed current cathodic protection system.The reference electrode is fixed on the hull surface and can be equivalent to the plate embedded electrode model.The potential characteristics of silver chloride reference electrode in moving seawater involve many aspects,and its potential characteristics are one of the focuses of current research.In order to explore the relationship between silver chloride reference electrode and seawater velocity in moving seawater,the plate embedded electrode model is taken as the research object,and the influence factors of seawater velocity and silver ion concentration on the surface of silver chloride electrode,electrode position,current density and electrode potential were simulated.The simulation results show that:in laminar flow field,the higher the seawater velocity is,the lower the potential of the plate embedded electrode is,and the higher the current density and limit current density generated on the surface of the plate embedded electrode are.The potential range is 0.36mV~0.48mV.