Gnedenkov Andrey S, Nomerovskii Alexey D, Tsvetnikov Aleksander K, Sinebryukhov Sergey L, Gnedenkov Sergey V
Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 159 Pr. 100-letiya Vladivostoka, 690022 Vladivostok, Russia.
Materials (Basel). 2023 Jan 18;16(3):918. doi: 10.3390/ma16030918.
Results of studying the properties of composite fluoropolymer-containing coatings formed by the cold spray (CS) method on the surface of constructional steel are presented. Different ways of protective coating formation are proposed. The composition of coatings was studied using SEM/EDX analysis. The incorporation of super-dispersed polytetrafluoroethylene (SPTFE) into the coating increases the corrosion resistance of the copper-zinc-based cold-sprayed coating. Analysis of the electrochemical properties obtained using EIS (electrochemical impedance spectroscopy) and PDP (potentiodynamic polarization) indicates that samples treated with SPTFE on a base copper-zinc coating showed lower corrosion current density and higher impedance modulus = 8.5 × 10 A cm, || = 5.3 × 10 Ω∙cm) than the specimen with cold-sprayed SPTFE = 6.1 × 10 A cm, || = 8.1 × 10 Ω∙cm). The best anticorrosion properties were revealed for the sample with a cold-sprayed base Cu-Zn layer annealed at 500 °C for 1 h, followed by SPTFE friction treatment and re-annealed at 350 °C for 1 h. The corrosion current density of such a coating is 25 times lower than that for the base Cu-Zn coating. The antifriction properties and hydrophobicity of the formed layers are described. Obtained results indicate that cold-sprayed polymer-containing coatings effectively improve the corrosion and wear resistivity of the treated material.
介绍了通过冷喷涂（CS）法在建筑钢材表面形成含复合含氟聚合物涂层的性能研究结果。提出了形成防护涂层的不同方法。使用扫描电子显微镜/能谱分析（SEM/EDX）研究了涂层的成分。将超分散聚四氟乙烯（SPTFE）掺入涂层中可提高铜锌基冷喷涂涂层的耐腐蚀性。使用电化学阻抗谱（EIS）和动电位极化（PDP）获得的电化学性能分析表明，在铜锌基底涂层上用SPTFE处理的样品显示出比冷喷涂SPTFE样品更低的腐蚀电流密度和更高的阻抗模量（ = 8.5 × 10 A/cm，|| = 5.3 × 10 Ω∙cm）（ = 6.1 × 10 A/cm，|| = 8.1 × 10 Ω∙cm）。对于在500°C下退火1小时的冷喷涂基底Cu-Zn层，然后进行SPTFE摩擦处理并在350°C下重新退火1小时的样品，显示出最佳的防腐性能。这种涂层的腐蚀电流密度 比基底Cu-Zn涂层低25倍。描述了形成层的减摩性能和疏水性。获得的结果表明，冷喷涂含聚合物涂层有效地提高了处理材料的耐腐蚀和耐磨性能。
