Effect of temperature on the electrochemical corrosion behavior of Sn-0.7Cu solder alloy in artificial sweat

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-03-29 DOI:10.1016/j.electacta.2025.146150

Gensheng Wu , Jianjun Xie , Xinxin Zhou , Weiyu Chen , Bo Yu

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引用次数: 0

Abstract

The electrochemical corrosion behavior of Sn-0.7Cu solder alloy in pH4.7 and pH7.8 artificial sweat is investigated at different temperatures. The passivation films are formed in both pH4.7 and pH7.8 artificial sweat, and their barrier properties are characterized using several techniques, including potentiodynamic polarization (PDP), potentiostatic polarization (PSP), electrochemical impedance spectroscopy (EIS) and Mott-Schottky (MS) measurements. The results indicate that the anodic polarization curves for Sn-0.7Cu in artificial sweat at all three temperatures exhibit a stable passivation region with a consistent current density. The Nyquist diagram indicates that the diameters of the capacitance arc of the passivation film formed by Sn-0.7Cu follows the order: 30 °C > 20 °C > 40 °C, under the same applied potential. 3D laser confocal imaging of the corroded surfaces reveals the most compact surface at 30 °C in pH7.8 artificial sweat, which is further confirmed by scanning electron microscope (SEM).

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研究了锡-0.7 铜焊料合金在 pH4.7 和 pH7.8 人工汗液中不同温度下的电化学腐蚀行为。在 pH4.7 和 pH7.8 人工汗液中都形成了钝化膜，并使用几种技术对其阻挡特性进行了表征，包括电位极化 (PDP)、电位静态极化 (PSP)、电化学阻抗光谱 (EIS) 和 Mott-Schottky (MS) 测量。结果表明，在所有三个温度下，人造汗液中 Sn-0.7Cu 的阳极极化曲线都呈现出稳定的钝化区，电流密度一致。奈奎斯特图表明，Sn-0.7Cu 形成的钝化膜的电容弧直径遵循以下顺序：30°C>20°C>40°C。腐蚀表面的三维激光共聚焦成像显示，在 pH 值为 7.8 的人工汗液中，30°C 时的表面最为致密，扫描电子显微镜（SEM）进一步证实了这一点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.