Evaporation of Electrolyte During SVET Measurements: The Scale of the Problem and the Solutions

Bouali A. C.; Bastos A. C.; Lamaka S. V.; Serdechnova M.; Ferreira M. G. S.; Zheludkevich M. L.

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Evaporation of Electrolyte During SVET Measurements: The Scale of the Problem and the Solutions

机译：在SVET测量过程中蒸发电解质：问题和解决方案的规模

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摘要

The objective of this work is to investigate the scale of the effect of spontaneous solution evaporation during SVET (Scanning Vibrating Electrode Technique) measurements and demonstrate how it biases the final results. When SVET maps are continuously acquired for more than several hours, the measured currents are smaller than expected. This is attributed to solvent (typically water) evaporation which leads to an increase in solution conductivity over time. If this is not considered when converting the measured potential differences into the local current densities, the SVET results display currents smaller than the true ones. Here, this effect is studied with a platinum disk electrode as source of a constant current and a model corroding system consisting of the AA2024/CFRP galvanic couple. Corrective actions are proposed to mitigate the problem, either in the experimental set-up or as numerical correction.

机译：这项工作的目的是探讨在SVET期间自发溶液蒸发效果的效果的规模，并展示其如何偏置最终结果。当SVET地图连续获取超过几个小时时，测量的电流小于预期。这归因于溶剂（通常是水）蒸发，这导致溶液电导率随时间的增加。如果在将测量的潜在差异转换为局部电流密度时不考虑这一点，则SVET结果显示小于真实的电流。这里，使用铂磁盘电极作为恒流源和由AA2024 / CFRP电流耦合组成的恒流和模型腐蚀系统来研究该效果。建议纠正措施减轻问题，无论是在实验设置还是作为数值校正。

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来源
《Electroanalysis》 |2019年第11期|共9页
作者
Bouali A. C.; Bastos A. C.; Lamaka S. V.; Serdechnova M.; Ferreira M. G. S.; Zheludkevich M. L.;
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作者单位

Helmholtz Zentrum Geesthacht Inst Mat Res Max Planck Str 1 D-21502 Geesthacht Germany;

Univ Aveiro CICECO Aveiro Inst Mat P-3810193 Aveiro Portugal;

Helmholtz Zentrum Geesthacht Inst Mat Res Max Planck Str 1 D-21502 Geesthacht Germany;

Helmholtz Zentrum Geesthacht Inst Mat Res Max Planck Str 1 D-21502 Geesthacht Germany;

Univ Aveiro CICECO Aveiro Inst Mat P-3810193 Aveiro Portugal;

Helmholtz Zentrum Geesthacht Inst Mat Res Max Planck Str 1 D-21502 Geesthacht Germany;

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原文格式 PDF
正文语种 eng
中图分类电化学、电解、磁化学;
关键词
SVET; scanning vibrating electrode technique; solution evaporation; conductivity;

机译：SVET;扫描振动电极技术;溶液蒸发;电导率;

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1. Evaporation of Electrolyte During SVET Measurements: The Scale of the Problem and the Solutions [J] . Bouali A. C., Bastos A. C., Lamaka S. V., Electroanalysis . 2019,第11期

机译：在SVET测量过程中蒸发电解质：问题和解决方案的规模
2. Mass Spectrometric Method of Field Evaporation of Ions from Solutions as a Potential Possibility of the Experimental Determination of Changes in the Enthalpy of Solvation of Ions and Ion Clusters in Electrolyte Solutions [J] . N.B.Zolotoy, G.V.Karpov Doklady Physical Chemistry . 2007,第0期

机译：质谱法从溶液中蒸发掉离子，作为实验确定电解质溶液中离子和离子簇的溶剂化焓变化的潜在可能性
3. Evaporation from three water bodies of different sizes and climates: Measurements and scaling analysis [J] . S. Assouline, S.W. Tyler, J. Tanny, Advances in Water Resources . 2008,第1期

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4. Ionic Transport in Non-Aqueous Electrolyte Solutions -(i) Experimental Measurements of Conductivity and Viscosity of MgX_2 (X=ClO_4~-, TFSA~-) Dissolved in PC and GBL [C] . Hikaru Sano, Satoshi Uchida, Hiroyuki Ozaki, Pacific Rim Meeting on Electrochemical and Solid-State Science . 2020

机译：非水电解质溶液中的离子转运 - （i）MgX_2（x = ClO_4〜 - ，TFSA〜 - ）导电性和粘度的实验测量（x = ClO_4〜 - ）溶解在PC和GBL中
5. Measurements and computations of the flow in full-scale sugar evaporative-crystallizers and in lab-scale models. [D] . Echeverri, Luis Fernando. 2007

机译：在全尺寸糖蒸发结晶器和实验室规模模型中的流量测量和计算。
6. A calcium-containing electrolyte-balanced hydroxyethyl starch (HES) solution is associated with higher factor VIII activity than is a non-balanced HES solution but does not affect von Willebrand factor function or thromboelastometric measurements - results of a model of in vitro haemodilution [O] . Juliane Rau, Christoph Rosenthal, Elisabeth Langer, 2014

机译：含钙的电解质平衡羟乙基淀粉（HES）溶液比非平衡的HES溶液具有更高的VIII因子活性但不影响von Willebrand因子功能或血栓弹力法测量-体外血液稀释模型的结果
7. Evaporation of Electrolyte during SVET Measurements: The Scale of the Problem and the Solutions [O] . A. C. Bouali, A. C. Bastos, S. V. Lamaka, 2019

机译：在SVET测量过程中蒸发电解质：问题和解决方案的规模
8. Measurement of Viscosities of Aqueous Electrolytic and Non Electrolytic Solutions [R] . Mahmood, M. T. 1986

机译：电解质和非电解质水溶液粘度的测量

Evaporation of Electrolyte During SVET Measurements: The Scale of the Problem and the Solutions

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