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首页> 外文期刊>Pigment & Resin Technology >Anticorrosive performance of ion-exchange zeolites in alkyd-based paints
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Anticorrosive performance of ion-exchange zeolites in alkyd-based paints

机译：醇酸树脂涂料中离子交换沸石的防腐性能

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Purpose - Organic coatings remain the most widely used way of protecting steel structures from corrosion. Traditional anticorrosive paints contain lead or hexavalent chromium compounds as active pigments. The use of these classical chromates is nowadays restricted by increasing environmental awareness and stringent national and international regulations. An alternative is the use of ion-exchangeable pigments. The purpose of this paper is to show that cation-exchanged zeolites can be considered as a safe and efficient alternative to traditional hazardous pigments in protecting steel surfaces. Design/methodology/approach - The new pigments were characterised using different analytical and spectro-photometric techniques. Characterisation of these pigments using X-ray diffraction and scanning electron microscopy were done. X-ray fluorescence was employed to elucidate the concentration of different elements in the prepared pigments. Evaluation of the ion-exchanged and initial zeolite pigments using international standard testing methods (ASTM) was estimated. Testing the anticorrosive protection of cation-exchanged zeolites in alkyd paints formulated based on their pigment volume concentration/critical pigment volume concentration was studied, and then these new pigments were applied on cold-rolled steel panels. The physico-mechanical properties of dry films and their corrosion properties using accelerated laboratory test in 3.5 per cent NaCl for 28 days were tested. Findings - The results of this work revealed that paint films containing initial Na-zeolite performed the least protection behaviour, while films including Zn, Ca and Mg-zeolites were better in their corrosion protection performance, and they can be arranged as Zn-zeolite>Ca-zeolite>Mg-zeolite. Practical implications - These pigments can be applied in other polymer composites, e.g. rubber and plastics as reinforcing agent and fillers. Originality/value - The paper shows that these prepared pigments are environmentally friendly pigments which impart high anticorrosive behaviour to paint films with great economic savings. Show less
机译：目的-有机涂层仍然是保护钢结构不受腐蚀的最广泛使用的方法。传统的防腐涂料包含铅或六价铬化合物作为活性颜料。如今，由于环保意识的增强以及严格的国家和国际法规，这些经典铬酸盐的使用受到限制。一种替代方法是使用离子可交换颜料。本文的目的是表明，阳离子交换沸石在保护钢表面方面可被视为传统危险颜料的安全有效替代品。设计/方法/方法-使用不同的分析和分光光度技术对新颜料进行表征。使用X射线衍射和扫描电子显微镜对这些颜料进行了表征。使用X射线荧光来阐明制备的颜料中不同元素的浓度。估算了使用国际标准测试方法（ASTM）对离子交换和初始沸石颜料的评估。研究了基于颜料体积浓度/临界颜料体积浓度配制的醇酸涂料中阳离子交换沸石的防腐蚀性能，然后将这些新型颜料应用于冷轧钢板。使用加速的实验室测试，在3.5％NaCl中测试28天，测定了干膜的物理机械性能及其腐蚀性能。发现-这项工作的结果表明，含有初始Na沸石的漆膜的防护性能最少，而包含Zn，Ca和Mg沸石的漆膜的防腐性能更好，并且可以按照Zn沸石的形式排列。 Ca-沸石> Mg-沸石。实际意义-这些颜料可用于其他聚合物复合材料，例如橡胶和塑料作为增强剂和填充剂。原创性/价值-本文表明，这些制备的颜料是对环境友好的颜料，可为漆膜赋予高防腐性能，并节省大量经济费用。显示较少

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