Wang Ziyu, Kong Delong, Wang Minghao, Wang Guixiang, Li Ning, Li Deyu
School of Chemistry and Chemical Engineering, Harbin Institute of Technology Harbin 150001 China
College of Materials Science and Chemical Engineering, Harbin Engineering University Harbin 150001 China.
RSC Adv. 2019 Apr 29;9(23):12990-12997. doi: 10.1039/c8ra10523e. eCollection 2019 Apr 25.
A novel chrome-free Ti-P composite film was prepared by casting a mixed solution containing titanium and phosphorus species, which is able to seal the pores on the tinplate surface. The obtained film was characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The surface porosity sealing effect on tinplates was verified by using a glow discharge spectrometer (GDS), porosity tests, and XPS. The results show that the film on the tinplates is composed of TiO, Ti(PO)·HO, and FePO. Micropores on the tinplates are reduced apparently after film deposition, and the content of iron exposed in the pores is decreased significantly. An obvious concentration peak of phosphorus at a depth of around 0.75 μm infers that the film can penetrate into the micro-pores. The film lead to a 42.5% decrease in the surface porosity of the tinplates, exhibiting an outstanding surface porosity sealing effect in comparison with pure Ti or P films. Mechanistic analysis using XPS indicates that Ti(PO)·HO and FePO in the film play a role in sealing the surface porosity.
通过浇铸含有钛和磷物种的混合溶液制备了一种新型无铬Ti-P复合膜，该复合膜能够密封马口铁表面的孔隙。使用扫描电子显微镜（SEM）、能量色散X射线光谱仪（EDS）和X射线光电子能谱仪（XPS）对所得薄膜进行了表征。使用辉光放电光谱仪（GDS）、孔隙率测试和XPS验证了马口铁表面孔隙率的密封效果。结果表明，马口铁上的薄膜由TiO、Ti(PO)·HO和FePO组成。薄膜沉积后，马口铁上的微孔明显减少，孔隙中暴露的铁含量显著降低。在约0.75μm深度处有明显的磷浓度峰，这表明该薄膜可以渗透到微孔中。该薄膜使马口铁的表面孔隙率降低了42.5%，与纯Ti或P薄膜相比，表现出优异的表面孔隙率密封效果。使用XPS进行的机理分析表明，薄膜中的Ti(PO)·HO和FePO在密封表面孔隙率方面发挥了作用。
