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| Evolution Laws of Coated TC21 Titanium Alloy during the Indoor Multi-factor Comprehensive Accelerated Aging Test |
| Received:March 06, 2020 Revised:April 04, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.10.005 |
| KeyWord:titanium alloy coatings multi-factor accelerated test island atmospheric environment electrochemical impedance |
| Author | Institution |
| PAN Qiao |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| ZHANG Qi |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| GE Yu-lin |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| GAO Meng |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| SUN Zhi-hua |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| YANG Li-yuan |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| YAN Wei |
Aero Engine Corporation of China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
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| Abstract: |
| The work aims to study the surface property evolution laws of coated TC21 titanium alloy specimens (acid pickling+ epoxy primer +polyurethane top-coat) during the indoor multi-factor comprehensive accelerated aging test. The marine atmosphere environment of tropical island reef was simulated indoors by a marine atmosphere comprehensive simulation test device. The samples after each accelerated test cycle were subject to appearance photo, gloss test, color difference test, optical micrograph and electrochemical impedance test (EIS), and the related change process was described. The glossiness loss rate and the chromatic aberration of the specimens after 5 cycles of accelerated test increased to 45.6% and 4.36, respectively. Additionally, the impedance magnitude of the coating at 0.01 Hz was changed from 2.74×1010 Ω to 6.21×107 Ω.The anti-corrosion ability of the TC21 titanium coating system is continuously decreasing during 5 cycles of indoor multi-factor comprehensive accelerated aging test, but does not completely fail after total 5 cycles of aging test. |
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