| 丁康康,刘亚强,顾良华,郭为民,侯健,孙明先.E420在南海岛礁海水环境腐蚀行为规律研究[J].装备环境工程,2020,17(10):1-7. DING Kang-kang,LIU Ya-qiang,GU Liang-hua,GUO Wei-min,HOU Jian,SUN Ming-xian.Corrosion Behavior of E420 in Seawater Environments of the Reef in the South China Sea[J].Equipment Environmental Engineering,2020,17(10):1-7. |
| E420在南海岛礁海水环境腐蚀行为规律研究 |
| Corrosion Behavior of E420 in Seawater Environments of the Reef in the South China Sea |
| 投稿时间：2020-04-07 修订日期：2020-04-17 |
| DOI：10.7643/issn.1672-9242.2020.10.001 |
| 中文关键词: 钢 南海岛礁 海水环境 腐蚀 |
| 英文关键词:steel reefs in the South China Sea seawter environmets corrosion |
| 基金项目: |
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| Author | Institution |
| DING Kang-kang | State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China |
| LIU Ya-qiang | Beijing Huanjia Communication Technology Co., Ltd, Beijing 100192, China |
| GU Liang-hua | State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China |
| GUO Wei-min | State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China |
| HOU Jian | State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China |
| SUN Ming-xian | State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China |
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| 中文摘要: |
| 目的 研究E420低合金钢材料在南海岛礁海水环境中的腐蚀行为规律。方法 通过外场暴露试验，分析E420钢在南海岛礁飞溅、潮差和全浸区带暴露0.5、1、1.5、2 a后的腐蚀形貌与动力学规律，并建立腐蚀速率灰色预测模型GM(1,1)。结果 随暴露周期的延长，南海岛礁不同海水区带环境下，E420的腐蚀速率呈下降趋势，点蚀深度则整体达到一个较高的水平。飞溅区腐蚀速率数值最大，远大于一般海域，潮差次之，全浸最小。灰色模型GM(1,1)的腐蚀速率预测值与实测值相对误差低于25%。结论 南海岛礁不同海水区带E420腐蚀严重，以飞溅尤为严酷，锈层防护作用有限。腐蚀随时间倾向于不均匀发展。灰色模型GM(1,1)用于预测岛礁海水环境腐蚀可以取得较好的结果｡ |
| 英文摘要: |
| The work aims to investigate the corrosion behavior and rules of E420 low alloy steel in seawater environments of the reef in the South China Sea. Field exposure test was carried out on E420 steel in the splash, tidal and immersion zones of South China Sea for 0.5 a, 1 a, 1.5 a and 2 a to study its corrosion morphology and law of dynamics and establish a grey prediction model GM(1,1) about corrosion rates. With the extension of the exposure period, the corrosion rate of E420 in different seawater zones of the reef in South China Sea decreased, while the pitting depth reached a higher level as a whole. The corrosion rates of E420 in the splash zone were the largest, far greater than that in the general sea areas, followed by the tidal zone, and the full immersion zone was the minimum. The relative error between the predicted corrosion rate based on GM(1,1) model and the measured corrosion rate was less than 25%.The environment in different seawater zones of the reef in South China Sea has severe corrosion property, especially in the splash zone, where formed anti-rust layers have limited protective effect. Corrosion tends to develop unevenly with time, and the grey model GM(1,1) can be used to predict the seawater corrosion of different zones in the South China Sea reef. |
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