表面处理工艺对铝合金型材涂层耐蚀性的影响研究

Study on the Influence of Surface Treatment Process on the Corrosion Resistance of Aluminum Alloy Profile Coating.

作者信息

Fan Lei, Wang Fatao, Wang Zhouhui, Hao Xuelong, Yang Neng, Ran Denglin

机构信息

School of Mechanical Electronic & Information Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China.

Key Laboratory of Coal Mine Intelligence and Robot Innovation and Application of Emergency Ministry, Beijing 100083, China.

出版信息

Materials (Basel). 2023 Sep 1;16(17):6027. doi: 10.3390/ma16176027.

DOI:10.3390/ma16176027

PMID:37687720

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10488388/

Abstract

This work focuses on different surface treatment processes of the 6061 aluminum alloy profile coatings in the construction industry, mainly including the sand powder film coating, the flat powder coating, the hard anodized film, and the ordinary heat-sealing oxidized coating. The corrosion resistance of the coated aluminum alloy in a 3.5 wt.% NaCl solution (pH 6.5-7.5) and the influence of different surface treatment processes on the corrosion resistance of different samples were studied by scanning electron microscope (SEM) and electrochemical workstation. The result shows that with the increase in corrosion time, the corrosion inhibition performance of the four coated aluminum alloy materials decreased significantly, and the order of decline is: sand powder film coating > hard anodized film > flat powder coating > ordinary heat-sealing oxidized coating. When corroded in a 3.5 wt.% NaCl solution for 2 h, the corrosion inhibition performances of the flat powder coating and ordinary heat-sealing oxidized coating are poor, while the inhibition performances of the sand powder film coating and hard anodized film are good, and the inhibition performance follows the following sequence: the sand powder film coating > hard anodized film> the flat powder coating > ordinary heat-sealing oxidized coating. When corroded in a 3.5 wt.% NaCl solution for 200 h, the corrosion inhibition performances of the sand powder film coating and the flat powder coating are poor, while the inhibition performances of hard anodized film and ordinary heat-sealing oxidized coating are good, and the inhibition performance follows the following sequence: hard anodized film > ordinary heat-sealing oxidized coating > the sand powder film coating > the flat powder coating.

摘要

这项工作聚焦于建筑行业中6061铝合金型材涂层的不同表面处理工艺，主要包括砂粉末涂层、平粉末涂层、硬质阳极氧化膜和普通热封氧化涂层。通过扫描电子显微镜（SEM）和电化学工作站研究了涂层铝合金在3.5 wt.% NaCl溶液（pH 6.5 - 7.5）中的耐腐蚀性以及不同表面处理工艺对不同样品耐腐蚀性的影响。结果表明，随着腐蚀时间的增加，四种涂层铝合金材料的缓蚀性能显著下降，下降顺序为：砂粉末涂层＞硬质阳极氧化膜＞平粉末涂层＞普通热封氧化涂层。在3.5 wt.% NaCl溶液中腐蚀2 h时，平粉末涂层和普通热封氧化涂层的缓蚀性能较差，而砂粉末涂层和硬质阳极氧化膜的缓蚀性能良好，缓蚀性能顺序为：砂粉末涂层＞硬质阳极氧化膜＞平粉末涂层＞普通热封氧化涂层。在3.5 wt.% NaCl溶液中腐蚀200 h时，砂粉末涂层和平粉末涂层的缓蚀性能较差，而硬质阳极氧化膜和普通热封氧化涂层的缓蚀性能良好，缓蚀性能顺序为：硬质阳极氧化膜＞普通热封氧化涂层＞砂粉末涂层＞平粉末涂层。