Khan Ahsan Riaz, Zhang Hai-Jun, Jun Zhang, Maosheng Zheng, Eldin Sayed M, Siddique Imran
Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
National United Engineering Laboratory for Biomedical Material Modification, Branden Industrial Park, Qihe Economic and Development Zone, Dezhou City, Shandong, China.
Front Chem. 2023 Feb 14;11:1142050. doi: 10.3389/fchem.2023.1142050. eCollection 2023.
Optimizing the pigment volume concentration of zinc phosphate pigments can protect Al alloy 6101 from alkaline media. Additionally, zinc phosphate pigments form a shielding film on the substrate and facilitate stopping the penetration of aggressive corrosion ions. The efficiency of eco-friendly zinc phosphate pigments is almost 98% during the corrosion analysis. A comparative study of physical aging of neat epoxy and Zinc Phosphate (ZP) pigment-modified epoxy coatings on Al alloy 6101 was conducted in Xi'an, China, for one year in all four seasons, where in summer for 3 months, results degraded more due to high UV radiation and humidity; it is found that peeling force of ZP pigments modified epoxy coatings is 50% higher of than that of the neat epoxy coatings though both peel-off adhesion strength and scratch test visibility decreased in both coatings; The electrochemical resistance of ZP pigments modified epoxy coatings is about 30% higher of than that of neat epoxy coatings, the corrosion rate of ZP pigments modified epoxy coatings is about 70% lower of than that of neat epoxy coatings, moreover the gloss retention is 20% higher in the modified epoxy; Optical surface observation of the coatings showed that the ZP modified epoxy coating could effectively restrict the crack and shrinkage in coatings after aging experimentation in the natural environment.
优化磷酸锌颜料的颜料体积浓度可以保护6101铝合金免受碱性介质的侵蚀。此外，磷酸锌颜料在基材上形成屏蔽膜，有助于阻止侵蚀性腐蚀离子的渗透。在腐蚀分析过程中，环保型磷酸锌颜料的效率几乎达到98%。在中国西安，对6101铝合金上的纯环氧树脂和磷酸锌（ZP）颜料改性环氧树脂涂层进行了为期一年的四季物理老化对比研究，其中夏季为期3个月，由于高紫外线辐射和湿度，结果退化更为严重；结果发现，ZP颜料改性环氧树脂涂层的剥离力比纯环氧树脂涂层高50%，尽管两种涂层的剥离附着力强度和划痕试验可见度均有所下降；ZP颜料改性环氧树脂涂层的耐电化学性比纯环氧树脂涂层高约30%，ZP颜料改性环氧树脂涂层的腐蚀速率比纯环氧树脂涂层低约70%，此外，改性环氧树脂的光泽保持率高20%；涂层的光学表面观察表明，在自然环境中进行老化试验后，ZP改性环氧树脂涂层可以有效限制涂层中的裂纹和收缩。
