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中国腐蚀与防护学报  2016, Vol. 36 Issue (4): 349-356    DOI: 10.11902/1005.4537.2015.145
  研究报告 本期目录 | 过刊浏览 |
A1060纯Al的海洋大气环境腐蚀寿命预测模型研究
刘海霞1,程学群1,2(),李晓刚1,2,3,肖葵1,2,董超芳1,2
1. 北京科技大学腐蚀与防护中心 北京 100083
2. 北京科技大学 腐蚀与防护教育部重点实验室 北京 100083
3. 中国科学院宁波材料技术与工程研究所 宁波 315201
Prediction Model for Corrosion of Aluminum 1060 in Marine Atmospheric Environments
Haixia LIU1,Xuequn CHENG1,2(),Xiaogang LI1,2,3,Kui XIAO1,2,Chaofang DONG1,2
1. Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
2. Key Laboratory for Corrosion and Protection (MOE), University of Science and Technology Beijing, Beijing 100083, China
3. Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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摘要: 

采用周浸实验模拟了A1060纯Al在我国万宁、西沙两种海洋大气环境下的腐蚀行为,用扫描电镜(SEM)、能谱分析 (EDS)、X射线衍射 (XRD) 和失重法等方法研究了A1060纯Al在室内模拟大气环境和户外实际大气环境中的腐蚀形貌、腐蚀产物和腐蚀动力学之间的相关性。结果表明,周浸实验后A1060的腐蚀形貌、腐蚀产物组成、腐蚀动力学规律与实际热带海洋大气环境暴露实验结果的相关性较好。结合灰关联法建立了A1060在两种海洋大气环境下的腐蚀寿命预测模型。
关键词 ： A1060,  海洋大气,  腐蚀,  寿命预测    
Abstract：

The corrosion behavior of pure aluminum A1060 in tropic marine environment was simulated by cyclic immersion test, while the correlation of the corresponding results of indoor cyclic immersion test and outdoor marine atmospheric corrosion test of A1060 was comparatively studied in terms of its corrosion morphology, corrosion products and corrosion kinetics by means of weight loss measurement scanning, electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results showed that the corrosion morphologies and phase constituents compositions of corrosion products after cyclic immersion test agreed fairly well with those after the real atmospheric test. Thereafter, a prediction model for the C corrosion prediction model of aluminum 1060 in two kinds of marine atmospheric environments, which aims to simulate the atmospheric environments at Wanning and Xisha areas in the South China Sea, was established built combined with Grey correlation method, while the corresponding arithmetic expressions could be described as follows i.e. TWN=146.7t 1.29 and TXS=862.3t 0.85 respectively.
Key words： A1060    marine atmosphere    corrosion    life prediction
    
基金资助:国家重点基础研究发展计划项目 (2014CB643300) 和国家材料环境腐蚀平台项目资助
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刘海霞,程学群,李晓刚,肖葵,董超芳. A1060纯Al的海洋大气环境腐蚀寿命预测模型研究[J]. 中国腐蚀与防护学报, 2016, 36(4): 349-356.
Haixia LIU, Xuequn CHENG, Xiaogang LI, Kui XIAO, Chaofang DONG. Prediction Model for Corrosion of Aluminum 1060 in Marine Atmospheric Environments. Journal of Chinese Society for Corrosion and protection, 2016, 36(4): 349-356.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.145      或      https://www.jcscp.org/CN/Y2016/V36/I4/349

Exposure site Cl- deposition ratemg(100 cm2d)-1 SO2 deposition ratemg(100 cm2d)-1 Tow (h/year)RH>80% / ha-1
Wanning 0.387 0.0478 6736
Xisha 1.123 <0.001 5600
表1  大气试验站2006~2012年的环境因素和大气污染物参数[14,15]
图1  A1060纯Al在不同浓度NaCl溶液中周浸实验720 h的表面腐蚀形貌
图2  A1060纯Al在不同环境下周浸实验720 h后去除腐蚀产物后的表面腐蚀形貌
图3  A1060纯Al在不同模拟溶液中周浸实验后的表面EDS结果
图4  A1060纯Al在5%NaCl模拟溶液中周浸实验720 h后腐蚀产物的XRD谱
图5  A1060纯Al在不同模拟溶液中周浸腐蚀失重曲线
NaCl concentration A n R2
1% 0.136 0.333 0.959
2% 0.082 0.427 0.946
3.5% 0.014 0.775 0.902
5% 0.016 0.716 0.910
表2  腐蚀动力学曲线拟合值
Test time X0wn X1 X2 X3 X4
0.5 a (144 h) 0.47 0.712 0.685 0.659 0.562
1 a (288 h) 0.69 0.896 0.920 1.128 0.923
2 a (576 h) 1.01 1.129 1.237 1.930 1.516
3 a (864 h) 1.26 1.292 1.471 2.642 2.026
4 a (1152 h) 1.48 1.422 1.663 3.302 2.490
表3  万宁地区腐蚀失重的统计量
Test time X0xs X1 X2 X3 X4
0.5 a (72 h) 1.31 0.565 0.509 0.385 0.342
1 a (144 h) 2.0 0.712 0.685 0.659 0.562
2 a (288 h) 3.05 0.896 0.920 1.128 0.923
3 a (432 h) 3.91 1.026 1.094 1.544 1.233
4 a (576 h) 4.66 1.129 1.237 1.930 1.516
表4  西沙地区腐蚀失重的统计量
Test time Y0xs Y1 Y2 Y3 Y4
0.5 a (72 h) 1 1 1 1 1
1 a (144 h) 1.526 1.260 1.344 1.711 1.643
2 a (288 h) 2.329 1.587 1.808 2.928 2.698
3 a (432 h) 2.983 1.816 2.149 4.009 3.607
4 a (576 h) 3.555 1.999 2.430 5.011 4.432
表5  万宁地区腐蚀失重的预处理结果
Test time Y0wn Y1 Y2 Y3 Y4
0.5 a (144 h) 1 1 1 1 1
1 a (288 h) 1.465 1.260 1.344 1.711 1.643
2 a (576 h) 2.144 1.587 1.807 2.928 2.698
3 a (864 h) 2.682 1.816 2.149 4.009 3.607
4 a (1152 h) 3.140 1.999 2.430 5.011 4.432
表6  西沙地区腐蚀失重的预处理结果
NaCl concentration Wanning Xisha
1% 0.68 0.58
2% 0.77 0.64
3.5% 0.62 0.60
5% 0.68 0.69
表7  室内外大气腐蚀实验的灰关联度γ
图6  不同浓度的NaCl模拟溶液用以模拟万宁海洋大气环境时的γ和K
图7  不同浓度NaCl溶液模拟西沙海洋大气环境的γ和K
Outdoor exposure time / a Indoor simulated accelerated time (WN) / h Indoor simulated accelerated time (XS) / h
1 147 862
2 359 1554
4 877 2802
6 1480 3954
8 2145 5050
表8  基于预测模型得到的A1060 在万宁和西沙腐蚀的室内模拟加速时间表
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