Electrochemical corrosion protection of neat and zinc phosphate modified epoxy coating: A comparative physical aging study on Al alloy 6101

被引：2
作者：
Khan, Ahsan Riaz [1 ,2 ,3 ]
Zhang, Hai-Jun [1 ,2 ]
Jun, Zhang [4 ,5 ]
Zheng Maosheng [3 ]
Eldin, Sayed M. [6 ]
Siddique, Imran [7 ]
机构：
[1] Tongji Univ, Shanghai Peoples Hosp 10, Sch Med, Dept Intervent & Vasc Surg, Shanghai, Peoples R China
[2] Natl United Engn Lab Biomed Mat Modificat, Branden Ind Pk, Dezhou, Shandong, Peoples R China
[3] Northwest Univ, Dept Chem Engn, Xian, Peoples R China
[4] Tongji Univ, Shanghai East Hosp, Res Ctr Translat Med, Sch Med, Shanghai, Peoples R China
[5] Shanghai Inst Stem Cell Res & Clin Translat, Shanghai, Peoples R China
[6] Future Univ Egypt, Fac Engn, Ctr Res, New Cairo, Egypt
[7] Univ Management & Technol, Dept Math, Lahore, Pakistan
来源：
FRONTIERS IN CHEMISTRY | 2023年 / 11卷
关键词：
modified epoxy; zinc phosphate; physical aging; electrochemical analysis; corrosion resistance; ANTICORROSION; TRANSPARENT; FABRICATION; RESISTANCE; STRESSES; DENSITY; PIGMENT;
D O I：
10.3389/fchem.2023.1142050
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
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页数：13
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