Pitting corrosion of 2A12 aluminum alloy long-scale specimen in simulated seawater splash zone, dynamic waterline zone and full immersion zone

被引:16
作者
Zhu, Yesen [1 ]
Hu, Taoyong [1 ]
Li, Yujie [2 ]
Hao, Junhua [2 ]
Han, Bin [2 ]
Yuan, Quan [2 ]
机构
[1] PowerChina Huadong Engn Corp Ltd, Hangzhou, Peoples R China
[2] Coll Tianjin Renai, Tianjin, Peoples R China
基金
中国博士后科学基金;
关键词
Aluminum alloy; Localized corrosion; Splash zone; Dynamic waterline;
D O I
10.1108/ACMM-01-2023-2747
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
PurposeThe aim of this paper is to construct a device that simulated the seawater splash zone, dynamic waterline zone (splash zone) and full immersion zone. Localized corrosion of 2A12 aluminum alloy long-scale specimen was studied. Design/methodology/approachCorrosion morphologies before and after the corrosion product removal were used to identify corrosion intensity at full seawater immersion zone, dynamic waterline zone (splash zone) and atmospheric zone. The average depth and diameter of corrosion pits in the three zones were evaluated by three-dimensional optical microscopy. The impact of wetting time of the atmospheric zone on the localized corrosion was investigated. FindingsCorrosion pits were observed on the surface on day 4 for the wetted atmospheric zone (Case 1), and on the surface on day 8 for the alternant wet/dry atmospheric zone (Case 2). The corrosion product layer on the surface for Case 1 was partially broken down while the layer on the surface for Case 2 was intact. Average pitting depth and pitting diameters for Case 1 were more serious than that for Case 2. Originality/valueThe above findings revealed that the humidity of the atmospheric zone had great impact on the localized corrosion of aluminum alloy at the seawater splash zone.
引用
收藏
页码:101 / 107
页数:7
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