Weather Resistance of Organosilicate Coatings in a Tropical Climate Depending on the Choice of the Pigment

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS

Glass Physics and Chemistry Pub Date : 2023-12-27 DOI:10.1134/S1087659623600680

V. I. Voshchikov, L. N. Krasil’nikova, Chi Văn Nguyên, A. M. Nikolaev, V. A. Aseev, O. A. Shilova

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Abstract

The results of a study of the weather resistance of protective and decorative organosilicate coatings prepared using organosilicate compositions based on polydimethylphenylsiloxane as a binder and hydrosilicates as fillers are presented. The color of the coatings varies due to the use of pigments: natural FeO_x minerals of yellow, red-brown, and brown shades of flowers. Using X-ray phase and X-ray fluorescence (XRF) analysis, it is established that the composition of minerals is primarily determined by iron oxides in the crystalline modification of hematite (α-Fe₂O₃) and goethite (α-FeO(OH)). Pigments contain a small number of impurity compounds of a number of elements that contribute to the color range of the coatings. Organosilicate coatings are exposed for 11 months in the tropical climate of two climatic zones of Vietnam (in the suburbs of Nha Trang and Ho Chi Minh City). The high corrosion resistance and color stability of the coatings are established during the entire test period. According to slight changes in the color and gloss, revealed by spectrophotometric and photoelectric methods, it is shown that higher resistance to solar radiation and other adverse climatic factors is typical for coatings with a brown pigment based on hematite; and the lowest, with a yellow pigment based on goethite.

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有机硅涂料在热带气候下的耐候性取决于颜料的选择

摘要本文介绍了对以聚二甲基苯基硅氧烷为粘合剂、氢硅酸盐为填料的有机硅组合物制备的防护性和装饰性有机硅涂料的耐候性研究结果。由于使用了颜料（黄色、红棕色和棕色花纹的天然氧化铁矿物），涂层的颜色各不相同。通过 X 射线相位和 X 射线荧光 (XRF) 分析，可以确定矿物的成分主要由赤铁矿（α-Fe2O3）和鹅铁矿（α-FeO(OH)）晶体结构中的氧化铁决定。颜料中含有少量由多种元素组成的杂质化合物，这些杂质化合物会影响涂层的颜色范围。有机硅涂料在越南两个气候区（芽庄郊区和胡志明市郊区）的热带气候中暴露 11 个月。在整个试验期间，涂层的高耐腐蚀性和颜色稳定性得到了证实。根据分光光度法和光电法显示的颜色和光泽的细微变化，可以看出，以赤铁矿为基础的棕色颜料涂料具有较高的抗太阳辐射和其他不利气候因素的能力，而以鹅卵石为基础的黄色颜料涂料的抗太阳辐射和其他不利气候因素的能力最低。

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来源期刊

Glass Physics and Chemistry 工程技术-材料科学：硅酸盐

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Glass Physics and Chemistry presents results of research on the inorganic and physical chemistry of glass, ceramics, nanoparticles, nanocomposites, and high-temperature oxides and coatings. The journal welcomes manuscripts from all countries in the English or Russian language.