Surface pretreatment is a key influential parameter on the protective function of silane coatings. The present study considers examining the effect of zinc cations addition to acid pretreatment solution on subsequent silane coating corrosion protection on mild steel. The electrochemical properties of subsequent silane coating on pretreated plates were assessed by electrochemical impedance spectroscopy and polarization measurements. The polarization resistance increased approximately two times in the presence of 3 g·L⁻¹ zinc cations, which agreed with electrochemical impedance spectroscopy data. Energy-dispersive X-ray spectroscopy (EDS) detected 3.13 wt% Zn on the zinc cation-pretreated substrate. Field emission scanning electron microscopy revealed surface morphological changes of pretreated samples in the presence of zinc cations. Contact angle, atomic force microscopy, grazing incidence X-ray diffraction, and EDS tests on the surface of pretreated samples evidenced that zinc cations reduced the oxidation and corrosion attacks on the steel surface. Raman spectroscopy revealed formation of a complex between Zn²⁺ cations and the organic inhibitor.

表面预处理是影响硅烷涂层保护功能的关键参数。本研究考虑检查添加到酸预处理溶液中的锌阳离子对后续硅烷涂层对低碳钢的腐蚀保护的影响。通过电化学阻抗谱和极化测量评估预处理板上后续硅烷涂层的电化学性能。在 3 g·L ^-1的存在下极化电阻增加了大约两倍锌阳离子，这与电化学阻抗谱数据一致。能量色散 X 射线光谱 (EDS) 在锌阳离子预处理的基材上检测到 3.13 wt% 的 Zn。场发射扫描电子显微镜揭示了在锌阳离子存在下预处理样品的表面形态变化。预处理样品表面的接触角、原子力显微镜、掠入射 X 射线衍射和 EDS 测试证明锌阳离子减少了钢表面的氧化和腐蚀攻击。拉曼光谱揭示了 Zn ²⁺阳离子和有机抑制剂之间复合物的形成。