Abstract Precipitation of CaCO3, as the most important part of scales, causes a serious problem in industrial equipment such as pipelines and desalination plants. The effect of the hydrogen evolution phenomenon on the electrochemical precipitation was studied through varying different factors including cathodic potential (CP), bicarbonate concentration, and solution temperature. The application of CP from −0.8 VSCE to −1.2 VSCE, an increase in bicarbonate concentration and temperature elevation from 25 °C to 45 °C led to the increase of scaling time (ts) and residual current density (ir). In all cases, it was indisputably found that the hydrogen evolution phenomenon had a predominant effect on the calcium carbonate precipitation. The surface analyses by means of scanning electron microscopy (SEM) showed formation of crystals in two defined forms of calcite and aragonite. Moreover, the energy dispersive spectroscopy (EDS) technique confirmed the formation of CaCO3 crystals.

中文翻译：

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人工海水中CaCO 3 沉淀析氢现象的研究

摘要 CaCO3 的沉淀是水垢的重要组成部分，给管道、海水淡化厂等工业设备带来了严重的问题。通过阴极电位 (CP)、碳酸氢盐浓度和溶液温度等不同因素研究析氢现象对电化学沉淀的影响。CP从-0.8 VSCE到-1.2 VSCE的应用，碳酸氢盐浓度的增加和温度从25°C到45°C的升高导致缩放时间（ts）和剩余电流密度（ir）的增加。在所有情况下，无可争议地发现，析氢现象对碳酸钙沉淀具有主要影响。通过扫描电子显微镜 (SEM) 进行的表面分析表明，以两种定义的方解石和文石形式形成了晶体。此外，能量色散光谱 (EDS) 技术证实了 CaCO3 晶体的形成。