Herein, thin NiPd nanoalloy thin films were coated on 316L stainless steel (SS) substrates by aerosol-assisted chemical vapor deposition (AACVD) to investigate their capability to protect the SS surface against corrosion in a marine environment. The nanoalloy films were coated at various thicknesses (1–2 μm) by changing the deposition time from 1 to 3 h using a precursor solution consisting of nickel(II) acetylacetonate and palladium(II) acetylacetonate. Analyses by X-ray diffraction, scanning electron microscopy/energy-dispersive X-ray spectrometry, and X-ray photoelectron spectroscopy confirmed the successful formation of clustered crystalline nanoparticles of NiPd alloy films with high phase purity and controlled thickness on steel substrates. The surface protection performance of the deposited films against corrosion in a 3.5% NaCl electrolyte was studied by potentiodynamic polarization and electrochemical impedance spectroscopic analyses, while the localized corrosion features were examined by the scanning vibrating electrode technique. These analyses suggested that the NiPd alloy film formed at a deposition time of 2 h exhibits excellent barrier protection performance against corrosion in the NaCl solution. Thus, the NiPd nanoalloy film formed by the facile, rapid, and cost-effective AACVD route is a highly promising protective coating for SS against the corrosive marine environment.

本文中，通过气溶胶辅助化学气相沉积（AACVD）将NiPd纳米合金薄膜涂覆在316L不锈钢（SS）基底上，以研究其在海洋环境中保护SS表面免受腐蚀的能力。通过使用由乙酰丙酮镍（II）和乙酰丙酮钯（II）组成的前体溶液，将沉积时间从1 h更改为3 h，可以将纳米合金薄膜涂覆成各种厚度（1-2μm）。通过X射线衍射，扫描电子显微镜/能量色散X射线光谱法和X射线光电子光谱法进行的分析证实，在钢基底上成功形成了具有高相纯度和受控厚度的NiPd合金膜的簇状结晶纳米颗粒。沉积膜的表面保护性能在3。通过电位动力学极化和电化学阻抗谱分析研究了5％NaCl电解质，同时通过扫描振动电极技术研究了局部腐蚀特征。这些分析表明，在2 h的沉积时间形成的NiPd合金膜表现出出色的阻隔性能，可抵抗NaCl溶液中的腐蚀。因此，通过简便，快速且具有成本效益的AACVD路线形成的NiPd纳米合金膜是SS极有希望的抗腐蚀海洋环境的保护性涂层。这些分析表明，在2 h的沉积时间形成的NiPd合金膜表现出出色的阻隔性能，可抵抗NaCl溶液中的腐蚀。因此，通过简便，快速且具有成本效益的AACVD路线形成的NiPd纳米合金膜是SS极有希望的抗腐蚀海洋环境的保护性涂层。这些分析表明，在2 h的沉积时间形成的NiPd合金膜表现出出色的阻隔性能，可抵抗NaCl溶液中的腐蚀。因此，通过简便，快速且具有成本效益的AACVD路线形成的NiPd纳米合金膜是SS极有希望的抗腐蚀海洋环境的保护性涂层。