聚（3,4-乙撑二氧噻吩）与杂多酸改性的硅烷复合涂层对X20Cr13和41Cr4钢的防护性能

Protective Properties of Silane Composite Coatings Modified with Poly(3,4-ethylenedioxythiophene) with Heteropolyacid on X20Cr13 and 41Cr4 Steel.

作者信息

Kucharczyk-Kotlewska Aleksandra, Adamczyk Lidia, Miecznikowski Krzysztof, Dudek Agata

机构信息

Department of Materials Engineering, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Aleja Armii Krajowej 19, 42-200 Czestochowa, Poland.

Faculty of Chemistry, University of Warsaw, Ludwika Pasteura 1, 02-093 Warsaw, Poland.

出版信息

Materials (Basel). 2024 Dec 18;17(24):6177. doi: 10.3390/ma17246177.

This paper describes the methodology of the preparation and analyses of the structure and anticorrosion properties of silane coatings modified with poly(3,4-ethylenedioxythiophene) (PEDOT) with phosphododecamolybdic acid (PMo). Protective coatings, consisting of vinyltrimethoxysilane (VTMS), PEDOT powder with PMo admixture (at different concentrations), and ethanol, were deposited on X20Cr13 and 41Cr4 steels by immersion. The physicochemical properties of these silane coatings (e.g., surface morphology, thickness, roughness, and adhesion to the substrate) were elucidated using a digital microscope, a Fourier transform infrared spectrophotometer with attenuated total reflectance, and various electrochemical diagnostic techniques. Protective properties were assessed in acidified sulfate solutions with and without chloride ions (pH 2). Experimental results have shown that this coating displayed the effective protection of steel against general and pitting corrosion, stabilized the corrosion potential in the passive state, and provided barrier protection.

本文描述了用磷十二钼酸（PMo）改性的聚（3,4 - 亚乙二氧基噻吩）（PEDOT）硅烷涂层的制备方法、结构分析及其防腐性能。由乙烯基三甲氧基硅烷（VTMS）、含不同浓度PMo混合物的PEDOT粉末和乙醇组成的防护涂层，通过浸泡法沉积在X20Cr13和41Cr4钢上。使用数字显微镜、衰减全反射傅里叶变换红外光谱仪以及各种电化学诊断技术，阐明了这些硅烷涂层的物理化学性质（如表面形貌、厚度、粗糙度和与基材的附着力）。在含和不含氯离子（pH 2）的酸化硫酸盐溶液中评估防护性能。实验结果表明，该涂层对钢具有有效的全面腐蚀和点蚀防护作用，能使腐蚀电位在钝态下稳定，并提供屏蔽保护。