Subjects: Geosciences >> Geography submitted time 2024-03-01 Cooperative journals: 《干旱区研究》
Abstract： To objectively reflect the surface water quality status, a combination of the Analytic Hierarchy Process Entropy Weight Method and the weighted average comprehensive evaluation principle were used to improve the fuzzy comprehensive evaluation method. The method was compared with the single factor evaluation, Nemero index, and traditional undefined extensive evaluation methods to evaluate the surface water environmental quality in the Chengde area in 2021. The results showed a significant spatiotemporal difference in the surface water quality. Except for some sections with poor water quality from July to September, the water quality in other sections was in Classes I–III; The main factors affecting surface water quality in the Chengde area were CODMn and TP; The single factor evaluation and the Nemero index methods could not reflect the overall water quality. Compared to the traditional fuzzy comprehensive evaluation method, the improved fuzzy comprehensive evaluation method considers the interaction between various pollution factors and weakened the impact of individual water quality indicators on the evaluation results. It can also rank the category of water quality, making it more suitable for evaluating the environmental quality of surface water in the Chengde area.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《中国腐蚀与防护学报》
Abstract： The copper phthalocyanine disulfonic acid CuPc-(SO3H)2 (CuPANI) was prepared with direct fast turquoise blue GL as raw material, and then the CuPANI doped polyaniline was obtained by chemical reaction of eigenstate polyaniline (EBPANI) with CuPc-(SO3H)2 in N,N′-dimethylformamide. The doped polyaniline was characterization by IR, UV-Vis and four point probe. The coatings with EBPANI or CuPANI as filler and epoxy resin 44 (EP-44) and 107 glue as adhesives were prepared on the surface of pretreated steel sheets, while the corrosion behavior of the sheets without and with coatings with EBPANI and CuPANI in 3.5%NaCl solution was investigated by electrochemical methods such as tafel polarization curve measurement, and alternating current impedance spectroscopy, respectively. The results indicated that the CuPANI doped polyaniline coating shows better anticorrosion performance.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-07 Cooperative journals: 《中国腐蚀与防护学报》
Abstract：以自制酞菁铜二磺酸(CuPc-(SO3H)2)为原料，采用“掺杂-脱掺杂-再掺杂”方法对本征态聚苯胺(EBPANI)进行导电改性。IR、UV-Vis分析表明，CuPc-(SO3H)2成功地对EBPANI进行了掺杂改性。四探针仪测试改性后的聚苯胺电导率为1.95 S/cm。通过电化学、耐酸性和中性盐雾试验等方法检测聚苯胺涂层的耐蚀性能，结果表明，酞菁铜磺酸能有效地掺杂聚苯胺，在5% HCl浸泡15d和中性盐雾试验300h，CuPANI涂层只出现少量气泡和8%的白霜，在3.5% NaCl溶液中CuPANI涂层使Fe的腐蚀电位从?0.849 V正移?0.646 V，说明CuPANI涂层对钢基片具有良好的防腐蚀性。
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