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首页> 外文期刊>JCT research >Performance of phosphate-alumina pigments in waterborne paints for protection of cold-rolled steel
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Performance of phosphate-alumina pigments in waterborne paints for protection of cold-rolled steel

机译：磷酸铝颜料在水性涂料中保护冷轧钢的性能

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摘要

Core-shell theory presents a new easy method to obtain high performance, economic, and eco-friendly anticorrosive mixed pigments. The core-shell pigments in this work are prepared by depositing a surface layer of an expensive efficient anticorrosive pigment (phosphates) on a bulk of less expensive extender pigment (alumina). The combination of these two compounds, led to the production of new pigments with improved properties different from each of its individual components; and consequently these improved properties led to changing the efficiency of protection properties of paint films containing these new pigments. The new pigments were characterized using XRD, SEM, TEM, and EDAX analysis to elucidate their structure and prove the presence of phosphate ions on the surface of alumina. These pigments were also evaluated according to ASTM measurements. Then they were incorporated in three groups of emulsion paint formulations based on styrene acrylic emulsion copolymer, and comprising different concentrations of Zn, Mg, and lZn-lMg phosphates/ alumina core-shell pigments; in addition to a control formulation free of these pigments, to evaluate their efficiencies in anticorrosive paints for protection of cold-rolled steel. Chemical, physical, and mechanical measurements were carried out, besides corrosion resistance tests and weight loss of steel panels under paint films which were determined in 5% NaCl solution for 28 days. The results proved that the prepared formulations containing the prepared pigments could protect steel efficiently from corrosion compared to the control specimen. Groups II and III containing higher weight percentages of prepared pigments showed the best performance in corrosion protection, and the best performance among these two groups was paint films containing magnesium phosphate/alumina pigments.
机译：核壳理论为获得高性能，经济和环保的防腐混合颜料提供了一种新的简便方法。这项工作中的核-壳颜料是通过在大量较便宜的增量颜料（氧化铝）上沉积一层昂贵的高效防腐颜料（磷酸盐）的表​​面层而制成的。这两种化合物的结合导致了新颜料的生产，这些颜料的特性有所改善，不同于每种成分。因此，这些改进的性能导致改变了包含这些新颜料的漆膜的保护性能的效率。使用XRD，SEM，TEM和EDAX分析对新颜料进行表征，以阐明其结构并证明氧化铝表面存在磷酸根离子。还根据ASTM测量评估了这些颜料。然后将它们掺入三组基于苯乙烯丙烯酸乳液共聚物的乳液涂料配方中，并包含不同浓度的Zn，Mg和1Zn-1Mg磷酸盐/氧化铝核-壳颜料。除了不含这些颜料的对照配方外，还评估了它们在保护冷轧钢的防腐涂料中的功效。除了在5％NaCl溶液中测定28天的涂膜下的耐腐蚀性测试和钢板重量损失外，还进行了化学，物理和机械测量。结果证明，与对照样品相比，包含制备的颜料的制备的配方可以有效地保护钢免受腐蚀。含有较高重量百分比的制备颜料的第二组和第三组显示出最佳的防腐性能，而这两组中的最佳性能是含有磷酸镁/氧化铝颜料的漆膜。

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