Polydimethylsiloxane (PDMS) is widely used from biomedical to industrial applications due to its nontoxic, hydrophobic, and transparent characteristics. PDMS has good thermal and adhesion properties; however, its mechanical properties are comparatively weak. Therefore, PDMS is blended with various polymers to effectively improve its mechanical properties. In this study, polyurethane (PU)–polydimethylsiloxane (PDMS) blended coatings of different concentrations were applied on the AISI 316L stainless steel surface. Their effects on corrosion and tribocorrosion properties were investigated in Ringer’s solutions. The blended polymer coatings were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The thermal properties of samples were examined by TGA and DSC. The surface images and cross-sectional were investigated using scanning electron microscopy (SEM). Tribocorrosion tests were carried out at open circuit potential (OCP). It was determined that hydrophobicity and thermal stability of polymer coating increased, while corrosion resistance slightly decreased with the increasing PDMS concentration in the polymer blended. The friction coefficient of blends decreased as the PU concentration increased. As a result, it was determined that the polymer-coated samples containing up to 50% PDMS prevented corrosive wear under the OCP wear test in Ringer’s solutions.

中文翻译：

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PU-PDMS涂层AISI 316L的腐蚀和热行为研究

聚二甲基硅氧烷（PDMS）因其无毒，疏水和透明的特性而被广泛用于生物医学和工业应用。PDMS具有良好的热和粘合性能；但是，其机械性能相对较弱。因此，PDMS与各种聚合物共混以有效改善其机械性能。在这项研究中，将不同浓度的聚氨酯（PU）-聚二甲基硅氧烷（PDMS）混合涂料应用于AISI 316L不锈钢表面。在林格氏溶液中研究了它们对腐蚀和摩擦腐蚀性能的影响。使用傅立叶变换红外光谱（FTIR），X射线衍射（XRD）和X射线光电子能谱（XPS）对掺混的聚合物涂层进行表征。通过TGA和DSC检查样品的热性质。使用扫描电子显微镜（SEM）研究表面图像和横截面。摩擦腐蚀测试在开路电势（OCP）下进行。可以确定的是，聚合物涂层的疏水性和热稳定性增加，而耐腐蚀性能随聚合物中PDMS浓度的增加而略有下降。共混物的摩擦系数随PU浓度的增加而降低。结果，确定了在林格氏溶液中，在OCP磨损测试下，含有高达50％PDMS的聚合物涂层样品可以防止腐蚀磨损。可以确定的是，聚合物涂层的疏水性和热稳定性增加，而耐腐蚀性能随聚合物中PDMS浓度的增加而略有下降。共混物的摩擦系数随PU浓度的增加而降低。结果，确定了在林格氏溶液中，在OCP磨损测试下，含有高达50％PDMS的聚合物涂层样品可以防止腐蚀磨损。可以确定，聚合物涂层的疏水性和热稳定性提高了，而耐腐蚀性能随着聚合物中PDMS浓度的增加而略有下降。共混物的摩擦系数随PU浓度的增加而降低。结果，确定了在林格氏溶液中，在OCP磨损测试下，含有高达50％PDMS的聚合物涂层样品可以防止腐蚀磨损。