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| Comparative Analysis on Properties of 4 Kinds of Coatings for Fasteners |
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| DOI：10.7643/issn.1672-9242.2023.03.006 |
| KeyWord:titanium alloy fasteners coating morphology electrochemical impedance spectrum neutral salt spray resistance acceleration spectrum comprehensive performance |
| Author | Institution |
| JIN Lei |
Science and Technology on Power Beam Process Laboratory,Aviation Key Laboratory of Advanced Surface Engineer Technology, AVIC Manufacturing Technology Institute, Beijing , China |
| GUO Jian |
Special Coatings and coatings Business Division, Liaoning Light Industry Research Institute Co., Ltd., Shenyang , China |
| SHI Zhuo |
Special Coatings and coatings Business Division, Liaoning Light Industry Research Institute Co., Ltd., Shenyang , China |
| WANG Li-dong |
Beijing Hangwei High-tech Connection Technology Co., Ltd., Beijing , China |
| CHANG Wei |
Science and Technology on Power Beam Process Laboratory,Aviation Key Laboratory of Advanced Surface Engineer Technology, AVIC Manufacturing Technology Institute, Beijing , China |
| LI Wen |
Science and Technology on Power Beam Process Laboratory,Aviation Key Laboratory of Advanced Surface Engineer Technology, AVIC Manufacturing Technology Institute, Beijing , China |
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| Abstract: |
| The work aims to apply 4 kinds of different coatings to the same fasteners to test their surface morphology, corrosion resistance and anti-fatigue under the same test conditions, screen out the potential coatings to replace traditional HW-A coatings, to enrich the varieties of surface coating materials for titanium alloy fasteners. 3D confocal, Ac impedance spectrum, neutral salt spray, accelerated spectrum and other methods were adopted to evaluate the properties of coatings on the fastener surface. The section morphology, surface morphology, roughness, corrosion resistance and anti-fatigue of each coating were studied and their key properties were analyzed comprehensively. The properties of the four kinds of coatings were initially determined by 3D confocal, Ac impedance spectrum, neutral salt spray, accelerated spectrum and other methods. The surface roughness of PTFE coatings was about 50% lower than that of CZ and GO coatings. The radius of PTFE electrochemical impedance spectrum was greatly improved than the other 3 kinds of coatings. The life of PTFE coatings was improved by 22.8% than that of the serving aluminum coatings HW-A, and PTFE coatings, which can basically meet the present production needs. Comparing with graphene coatings and polyurethane coatings containing chromate, PTFE coatings have the better workability, key properties and they are more suitable for fasteners and they have great potential in the future. |
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