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To study the corrosion behavior and differences between 1070A and 6063 aluminum alloys in simulated marine atmospheric environments， the corrosion processes of 1070A and 6063 aluminum alloys in marine atmospheric environments are simulated by indoor cyclic salt spray experiments. The corrosion morphology， pitting parameters and the corrosion products of the 1070A and 6063 aluminum alloys are observed and detected by ultra-depth-of-field microscope and X-ray diffractometer respectively. The corrosion mass loss of 1070A and 6063 aluminum alloys is analyzed by corrosion kinetics methods. The differences of corrosion behaviors between the 1070A and 6063 aluminum alloys are analyzed by electrochemical impedance and polarization curves. The test results show that pitting corrosion is the main corrosion form on 1070A and 6063 aluminum alloys in the simulated marine atmospheric environment. With the extension of corrosion time， the average pitting depth， the maximum pitting depth and the pitting density gradually increase. The corrosion behaviors of 1070A and 6063 aluminum alloys are similar in the early stage of corrosion test. However， the pitting depth and pitting density of 6063 aluminum alloy doubled in the later corrosion stage， which is due to the re-cracking of the surface corrosion layer， resulting in a serious increase in the corrosion degree of 6063 aluminum alloy. What’s more， the corrosion mass loss and corrosion time of both 1070A and 6063 aluminum alloys show a power exponential relationship. Combined with the analysis of electrochemical impedance spectra and polarization curves， it is confirmed that the 6063 aluminum alloy is more susceptible to corrosion in simulated marine atmospheric environments， with a higher degree of corrosion compared to 1070A aluminum.
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| 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 |
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