热带海洋环境中5083铝合金腐蚀行为研究  

Corrosion Behaviors of 5083 Aluminum Alloy in Tropical Marine Environment

作　　者：彭文山 段体岗[1] 马力[1] 谭振江 辛永磊[1] 孙明先[1] PENG Wen-shan;DUAN Ti-gang;MA Li;TAN Zhen-jiang;XIN Yong-ei;SUN Ming-xian(State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute(LSMRI),Shandong Qingdao 266237,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,山东青岛266237

出　　处：《装备环境工程》2023年第3期77-83,共7页Equipment Environmental Engineering

摘　　要：目的 研究某岛礁不同海洋区带环境中5083铝合金的腐蚀规律。方法 在某岛礁进行海洋多区带腐蚀试验,利用表面微观形貌观测、腐蚀产物分析、质量损失测试及点蚀深度测量等手段,对比分析铝合金在不同海洋区带中的腐蚀形貌、腐蚀速率和点蚀深度。结果 5083铝合金在某岛礁海洋全浸区带环境中的腐蚀速率最大,大气区带中的腐蚀速率最小,在潮差区带的腐蚀速率介于二者之间。试样在海洋不同区带主要发生局部腐蚀,大气区试样的最大点蚀深度最大,而潮差区试样的最大点蚀深度最小。在不同海洋区带,铝合金腐蚀产物和附着物的混合物中均含有钙元素,大气区钙元素含量远低于潮差区和全浸区,潮差区和全浸区铝合金表面的腐蚀产物和附着物混合物中主要含有CaCO_(3)、CaSiO_(3)和Al_(2)O_(3)。结论 不同海洋区带环境中,5083铝合金的腐蚀速率差别较大,潮差区和全浸区材料表面附着大量污损生物和矿物质。The work aims to study the corrosion law of 5083 aluminum alloy in different marine zones in a reef environment.Multi-zone corrosion tests were carried out in a reef.The corrosion morphology,corrosion rate and pitting depth of aluminum alloy in different marine zones were compared and analyzed by methods of surface morphology observation,corrosion product analysis,weight loss test and pitting depth measurement.The results showed that the highest corrosion rate of 5083 aluminum alloy occurred in the full immersion zone of a reef,and the lowest occurred in the atmospheric zone.The corrosion rate in the tidal range zone was between the other two zones.In different marine zones,the samples mainly had local corrosion.The maximum pitting depth of the samples in the atmospheric zone was the largest,while the maximum pitting depth of the samples in the tidal range zone was the smallest.The mixture of aluminum alloy corrosion products and attachments in different marine zones contained calcium.The content of calcium in the atmospheric zone was much lower than that in the tidal range zone and the full immersion zone.The mixture of corrosion products and attachments on the surface of aluminum alloy in the tidal range zone and the full immersion zone mainly contained CaCO_(3),CaSiO_(3) and Al_(2)O_(3).The corrosion rate of 5083 aluminum alloy in different marine zones varies greatly, and a large number of fouling organisms and minerals are attached to the material surface in the tidal range zone and the full immersion zone.

关 键 词：岛礁环境 海洋区带 铝合金 海洋腐蚀 点蚀 

分 类 号：TG172[金属学及工艺—金属表面处理]