Full
Outline
In this paper, the causes of surface blistering of electrophoretic coating plate for DC04 cold rolled automobile steel after 60-cycle cyclic corrosion resistance test are analyzed with scanning electron microscope and energy dispersive spectrometer. The test results showed that the size of phosphating phase in blistering area was approximately 10~25 μm, while that in non-blistering area was about 2~3 μm; such characteristic elements of phosphating phase as Zn and P were not detected in blistering area, while the phosphating film was bound tightly with matrix and electrophoretic coating film in non-blistering area as well as there were such characteristic elements of phosphating phase as Zn and P in phosphating film. The binding force of matrix, phosphating film and electrophoretic coating film is reduced by coarse phosphating phase as well as the channel for extension of corrosive liquid is provided so that there is surface blistering of electrophoretic coating plate for DC04 cold rolled automobile steel after 60-cycle cyclic corrosion resistance test finally. The incomplete degreasing during pretreatment of automobile steel and there is residual oil on the surface may be the causes for the abnormal growth of phosphating phase.
109
26
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
