Study on the Corrosion Behavior of D36 Steel Plate and H62 Copper Alloy Net for Marine Aquaculture Facilities in Simulated Seawater
Study on the Corrosion Behavior of D36 Steel Plate and H62 Copper Alloy Net for Marine Aquaculture Facilities in Simulated Seawater
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DOI：
10.3390/jmse11050975
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发表时间：
2023-05
影响因子：
2.9
通讯作者：
Fengfeng Gao;Fukun Gui;Dejun Feng;X. Qu;F. Hu;X. Yang
中科院分区：
文献类型：
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作者：
Fengfeng Gao;Fukun Gui;Dejun Feng;X. Qu;F. Hu;X. Yang
海水养殖设施长期工作在高盐度、高湿度的海洋环境中，不可避免地会受到海水腐蚀的影响，特别是金属网架等主要结构。因此，研究网架钢的腐蚀行为对海水养殖设施的选材和防腐具有重要意义。采用失重法和电化学方法研究了氯化钠浓度和浸泡状态对H62铜合金网板/D36钢板自腐蚀行为的影响，以及涂层厚度和重叠面积对电偶腐蚀行为的影响。通过拉伸试验，观察了不同腐蚀条件对钢丝网最大拉力和抗拉强度的影响。随着氯化钠浓度的增加，两种材料的腐蚀速率均迅速增加；随着时间的延长，两种材料的腐蚀速率均呈下降趋势，且H62的腐蚀速率始终低于D36钢。当两种材料耦合时，电偶腐蚀速率随层厚和重叠面积的增加而减小。拉伸结果与腐蚀结果一致。当这两种材料共同工作时，增加层厚或增加重叠面积是在一定程度上保护框架钢的方法之一。
Marine aquaculture facilities have been working in a high salt and humidity marine environment for a long time, which makes them be inevitably affected by seawater corrosion, especially the main structures such as metal mesh and frame. Therefore, studying the corrosion behavior of net and frame steel is of great significance for the selection of materials and corrosion protection of marine aquaculture facilities. The influence of NaCl concentrations and immersion state on self-corrosion behavior and the influence of layer thickness and overlapping area on galvanic corrosion behavior of H62 copper alloy mesh/D36 steel plate was discussed in this study using weight loss and electrochemical measurements. The tensile tests were conducted to observe the influence of different corrosion conditions on maximum force and tensile strength of the net. The corrosion rate of the two materials increased rapidly with the increase of NaCl concentrations; the corrosion rate of both materials showed the decreasing trend with the extension of time, and the corrosion rate of H62 was always lower than D36 steel. When two materials were coupled, the galvanic corrosion rate would decrease with the increase of the layer thickness and overlapping area. The tensile results were consistent with the corrosion results. When these two materials work together, adding layer thickness or increasing the overlapping area is one of the ways to protect the frame steel to a certain extent.