| WEI Xue,WANG Zhen,YIN Xiao,ZHENG Zhaojian,SONG Weiwei,WANG Huae.Simulation Analysis of Corrosion State of Electric Couple Connectors under Accelerated Corrosion Environment[J],54(8):136-144 |
| Simulation Analysis of Corrosion State of Electric Couple Connectors under Accelerated Corrosion Environment |
| Received:June 27, 2024 Revised:November 25, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.08.012 |
| KeyWord:aluminum alloy galvanic corrosion corrosion simulation anodizing salt spray test crevice corrosion |
| Author | Institution |
| WEI Xue |
China National Heavy Duty Truck Group Co., Ltd., Jinan , China |
| WANG Zhen |
China National Heavy Duty Truck Group Co., Ltd., Jinan , China |
| YIN Xiao |
China National Heavy Duty Truck Group Co., Ltd., Jinan , China |
| ZHENG Zhaojian |
China National Heavy Duty Truck Group Co., Ltd., Jinan , China |
| SONG Weiwei |
China National Heavy Duty Truck Group Co., Ltd., Jinan , China |
| WANG Huae |
China National Heavy Duty Truck Group Co., Ltd., Jinan , China |
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| Abstract: |
| To analyze the effect of anodic oxidation on the corrosion resistance of materials by corrosion simulation analysis technology, the simulation results are verified by real salt spray test. The method is to construct the lap model of aluminum alloy and carbon steel through 3D modeling, the corrosion simulation analysis software is used to simulate and analyze the galvanic corrosion, uniform corrosion and crevice corrosion of lap joints. The anodizing process of aluminum alloy is sulfuric acid anodizing, which is a process of forming an oxide film on aluminum products (anode) under the action of external current in sulfuric acid electrolyte and specific process conditions. Due to the effect of the construction technology and the film forming effect of the material surface, no discussion is conducted. By comparing the degree of corrosion by the two bonding methods (0 mm gap and 1 mm gap), the areas affected by corrosion and the degree and type of corrosion in each area are further determined. Corrosion rate, corrosion loss, current density, potential and other information at different locations are displayed by means of corrosion simulation cloud map. After 8 days of simulation, the analysis cloud map is obtained successively. Among them, 6016 has the highest corrosion rate and corrosion loss. The results of simulation analysis are compared and verified by salt spray test, and the corrosion resistance of aluminum alloy and carbon steel is compared. The results show that the areas affected by corrosion are mainly the lap surface and the edge of the lap joint when the gap is 0 mm. At 0 mm gap, 6016 and 6016 are anodized and 08F cold rolling salt spray test is carried out after 8 days. 08F cold rolling leads to slight corrosion and the corrosion of 6016 and 6016 anodized lap surfaces is deeper, the lap edge has a certain corrosion depth and the 6016 and 6016 anodized unbonded area has no obvious corrosion. At 1 mm gap, no obvious corrosion is found after 8 days of 6016 anodic oxidation, 6016 and 08F cold rolling salt spray test. The corrosion resistance of aluminum alloy 6016 is obviously improved after anodizing. When alloy 6016 anodized and 6016 and 08F are cold rolled, under the condition of no gap, the test part is mainly affected by galvanic corrosion and crevice corrosion, the affected areas are mainly 6016 anodized or 6016 lap surfaces and the effect of uniform corrosion is much lower than that of galvanic corrosion and crevice corrosion. The results of corrosion simulation analysis with CorrosionMaster software are basically consistent with the results of real salt spray test. Under the condition of 0 mm gap, the metal material is obviously affected by gap corrosion. Therefore, in the actual situation, the real corrosion of the material and the corrosion simulation analysis conclusion should be viewed objectively. |
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