聚苯乙烯薄膜作为铜及铜合金腐蚀防护的阻隔层。

Polystyrene films as barrier layers for corrosion protection of copper and copper alloys.

机构信息

Department of Interfaces and Surface Modification, Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pusztaszeri út 59-67., 1025 Budapest, Hungary.

Aquatic Biotechnology, Biofilm Centre, Faculty of Chemistry, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany.

出版信息

Bioelectrochemistry. 2014 Jun;97:7-14. doi: 10.1016/j.bioelechem.2013.10.002. Epub 2013 Oct 25.

DOI:10.1016/j.bioelechem.2013.10.002

PMID:24239277

Abstract

Dip-coated polystyrene layers of sub-micrometre thickness (85-500nm) have been applied on copper and copper alloys (aluminium brass, copper-nickel 70/30), as well as on stainless steel 304, and produced an effective barrier against corrosion and adhesion of corrosion-relevant microorganisms. According to the dynamic wettability measurements, the coatings exhibited high advancing (103°), receding (79°) and equilibrium (87°) contact angles, low contact angle hysteresis (6°) and surface free energy (31mJ/m(2)). The corrosion rate of copper-nickel 70/30 alloy samples in 3.5% NaCl was as low as 3.2μm/a (44% of that of the uncoated samples), and in artificial seawater was only 0.9μm/a (29% of that of the uncoated samples). Cell adhesion was studied by fluorescence microscopy, using monoculture of Desulfovibrio alaskensis. The coatings not only decreased the corrosion rate but also markedly reduced the number of bacterial cells adhered to the coated surfaces. The PS coating on copper gave the best result, 2×10(3)cells/cm(2) (1% of that of the uncoated control).

摘要

已经在铜和铜合金（铝黄铜、铜镍 70/30）以及不锈钢 304 上涂覆了亚微米厚度（85-500nm）的聚苯乙烯层，形成了有效的腐蚀和相关微生物附着的阻隔层。根据动态润湿性测量，涂层表现出高前进角（103°）、后退角（79°）和平衡角（87°），低接触角滞后（6°）和表面自由能（31mJ/m²）。在 3.5%NaCl 中，铜镍 70/30 合金样品的腐蚀速率低至 3.2μm/a（未涂覆样品的 44%），在人工海水中仅为 0.9μm/a（未涂覆样品的 29%）。通过使用脱硫弧菌的单细胞培养，通过荧光显微镜研究了细胞附着。涂层不仅降低了腐蚀速率，而且明显减少了附着在涂覆表面的细菌细胞数量。铜上的 PS 涂层效果最佳，为 2×10³ 个细胞/cm²（未涂覆对照的 1%）。