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Galvanic Corrosion Behaviour of Aluminium 3004 and Copper in Tropical Marine Atmosphere 被引量:11

Galvanic Corrosion Behaviour of Aluminium 3004 and Copper in Tropical Marine Atmosphere
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摘要 The galvanic corrosion behaviour of aluminium 3004 and copper with different area ratios were studied in the tropical marine atmosphere at Tuticorin harbour over a period of 426 days. The area ratios OfAAI: Acu, studied were l:l, 1:2, l:4, 1:8, 2:1, 4:1 & 8:1. The galvanic corrosion behaviour of metals was studied in terms of relative increase in the corrosion rate of aluminium due to galvanic coupling with copper, relative decrease in the corrosion rate of copper due to galvanic coupling with aluminium, and the susceptibility of aluminium to pitting owing to galvanic coupling with copper, The galvanic potential and galvanic current of the system were monitored. Pits of different dimensions ranging from mild etchings to perforations were experienced on the borders and the surfaces of the interface of aluminium in contact with copper. The weathering parameters and the environmental pollutants which have a major role in influencing the galvanic corrosion of metals were also monitored. The corrosion products resulting from galvanic corrosion were analysed using XRD and the pitting on aluminium resulting from galvanic corrosion has been highlighted in terms of pit depth, size and density of pit, using a high resolution microscope.
出处 《Journal of Marine Science and Application》 2014年第2期230-236,共7页 船舶与海洋工程学报(英文版)
基金 the CSIR-CECRI for the financial support (Project No. MLP 0008)
关键词 aluminium 3004 COPPER galvanic corrosion corrosionproducts PITTING tropical marine atmosphere 电偶腐蚀 腐蚀行为 海洋大气 热带 X射线衍射分析 腐蚀速率
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