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首页> 外文期刊>Electrochemical and solid-state letters >Electrochemical Noise during Pitting Corrosion of Aluminum in Chloride Environments
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Electrochemical Noise during Pitting Corrosion of Aluminum in Chloride Environments

机译:氯化物环境中铝的点蚀过程中的电化学噪声

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摘要

Aluminum shows vigorous fluctuations in current and potential in chloride containing media close to its pitting potential. To determine the source of this noise, we used aqueous solutions, gels with a pH indicator, and currents between interconnected electrodes, to locate pits and study currents generated at freely corroding potentials. We demonstrated that there is a transition in the characteristics of the noise. Transitions occur when pits continue to remain active, and also when more than one active pit is present because of the electrochemical communication that takes place between them. The major source of current and potential transients with aluminum is due to the growth process in active pits, rather than metastable pitting at the passive surface.
机译:铝在含氯介质中的点蚀电位附近显示出电流和电位的剧烈波动。为了确定这种噪声的来源,我们使用了水溶液,带有pH指示剂的凝胶以及相互连接的电极之间的电流,以定位凹坑并研究在自由腐蚀电位下产生的电流。我们证明了噪声特征存在过渡。当凹坑继续保持活性时,以及由于存在于它们之间的电化学连通而存在一个以上的活性凹坑时,就会发生过渡。铝电流和潜在瞬态的主要来源是由于主动凹坑中的生长过程,而不是由于被动表面处的亚稳态凹坑。

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