|
| Corrosion Behaviors of Ultrahigh-strength Steel Covered with Cd-Ti Coating Plated from Non-cyanide Bath by Thermal-humidity Cycling Test |
| Received:February 07, 2018 Revised:May 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.05.006 |
| KeyWord:A-100 steel Cd-Ti layer thermal-humidity cycling test corrosion |
| Author | Institution |
| PAN Qiao |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| LIU Ming |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| TANG Zhi-hui |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| SUN Zhi-hua |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| LUO Chen |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| GAO Meng |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| YAN Wei |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
| GAO Jian |
Key Laboratory of Science and Technology on advanced Corrosion and Protection for Aviation Material, Aero Engine Corporation of China Aviation, AECC Beijing Institute of Aeronautical Materials, Beijing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To research corrosion behaviors of ultrahigh-strength steel coated with Cd-Ti layer which is plated from non-cyanide bath during thermal-humidity cycling tests. Methods Thermal-humidity cycling test was applied to the samples of ultrahigh-strength steel. Marco and micro images of the samples were taken after each acceleration period. Corrosion behaviors in each acceleration period were researched by electrochemical tests. Results Local corrosion areas distributed on the coating surface of the samples after 384h of thermal-humidity cycling tests; the weight-loss of the samples increased with the increase of test time. However, it increased relatively slowly in the first several testing cycles (≤384 h), while increased faster in the further test (>384 h). The corrosion kinetics equation and curves revealed that the corrosion rate increased dramatically during the later cycling periods. In addition, the impedance magnitude at 0.01 Hz of the sample experiencing thermal-humidity cycling tests over 1536 h was tested to be 102 Ω. Conclusion The coating is corroded in the early cycling periods. It spreads slowly during the middle cycling periods, but get serious in the later cycling periods. The power function fitting equation of the weight loss related to the time is found to be D(t)=0.013t1.2095, while the correlation coefficient is R2=0.9879. |
| Close |
|
|
|