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Outline
The medium carbon low alloy ultra-high strength steel 24SiMn2TiB was selected as the research subject. Specific alloying elements (Cr, Ni, and Cu) were incorporated into the base composition of the steel, and the corrosion behaviors of both the original and modified steels in a simulated marine atmospheric environment were systematically evaluated by electrochemical measurements and salt spray tests. The results showed that the addition of 0.77% Ni, 0.72% Cr and 0.32% Cu significantly enhanced the corrosion resistance of 24SiMn2TiB steel under simulated marine atmospheric environment, with the corrosion rate reduced by 11.1% to 22.7% compared to the original steel. Further analysis revealed that Ni, Cr, and Cu facilitated the formation of stable corrosion products, particularly α-FeOOH, which contributed to the formation of a compact rust layer and thus further improved the corrosion resistance of the medium carbon low alloy ultra-high strength steel 24SiMn2TiB.
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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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