共查询到19条相似文献,搜索用时 78 毫秒
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介绍了“鸟巢”国家体育场用氟碳涂料与其他FEVE型氟碳树脂涂料在海南的天然曝晒试验与人工加速老化试验数据,并进行了对比分析,阐述了各种类型氟碳树脂涂料在耐老化性方面存在差异的主要原因。 相似文献
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讨论了考察涂料耐候性的户外曝晒试验和人工气候加速老化试验方法的差异。指出了人工气候加速老化试验存在的问题,其试验结果不能直接推断出涂料的实际使用寿命。 相似文献
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通过氟碳涂料在杭州湾跨海大桥钢结构防腐工程的选材、涂装工艺、质量控制及一年多来的应用综述,并对局部涂层出现质量弊病产生的原因进行分析,以供施工控制借鉴。 相似文献
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氟碳涂料在杭州湾跨海大桥钢结构防腐工程的应用 总被引:2,自引:0,他引:2
通过氟碳涂料在杭州湾跨海大桥钢结构防腐工程的选材、涂装工艺、质量控制及1a多来的应用综述,并对局部涂层出现质量弊病产生原因进行分析,以供施工控制借鉴。 相似文献
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采用溶液沉淀聚合工艺,制备以三氟氯乙烯为主要共聚单体热固性氟粉末树脂,分析探讨树脂结构设计及各组分影响,介绍了热固性氟粉末涂料耐酸碱、盐雾、老化等性能试验结果,最后针对应用于不同金属基材的表面处理工艺做了探索性研究。 相似文献
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耐候性有机涂层加速老化试验研究进展 总被引:12,自引:0,他引:12
对引起涂层老化的主要因素及加速老化试验设计原则进行了介绍。在此基础上,综述了现有的涂层加速老化试验及其特点,指出涂层加速老化试验研究中存在的问题,探讨了解决方法,对涂层加速试验研究的将来进行了展望。 相似文献
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本文通过实验对比了不同助剂对常温固化型FEVE氟碳涂料涂膜耐酸碱性能的影响,并且分析了其主要原因. 相似文献
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介绍了常用的几种老化试验方法。对汽车内外饰材料的老化试验标准和基础老化试验标准中的主要参数进行比较和探讨。 相似文献
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The tribological performance of TiN,WC/C and DLC coatings measured by the four-ball test 总被引:1,自引:0,他引:1
An innovative approach to improving the wear resistance and load-carrying capacity of surfaces is by development of novel systems featuring coating treatment. Evaluation of the tribological performance of three physical vapor deposition (PVD) coatings, namely, TiN, WC/C, and DLC (diamond-like carbon), is necessary to determine their suitability as coatings for high-speed and heavy-duty power-transmitting gears. The uncoated and coated steel balls were subjected to four-ball tests under lubricated conditions. An optical microscope and a scanning electron microscope were used to observe wear scars, and energy-dispersive X-ray analysis was performed to determine the chemical compositions of the materials; these methods were also used to analyze the wear mechanisms. The wear performance of the three coatings was compared, and a four-ball method extreme pressure test was performed to determine the last nonseizure load of each tribo-pair. The WC/C and DLC coatings showed excellent tribological performance under high contact pressures and thermal loads, and the benefits of these coatings increased with decreasing performance of the lubricating medium. Therefore, WC/C and DLC coatings are suitable for application in high-speed and heavy-duty gears. Oxidation wear and peeling, fatigue pitting, and adhesive transfer are the main coating failure modes of the TiN, WC/C, and DLC coatings, respectively. 相似文献
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Jinwei zhang Cunguo Lin Li Wang Jiyong Zheng Fengling Xu Zhiyong Sun 《Progress in Organic Coatings》2013
In this paper, two organisms, diatom and Ulva spore, were employed to evaluate the antifouling performance of five fouling-release (FR) coatings in laboratory, and field test was also assessed. The correlation of lab assay and field test was studied using Spearman's rank correlation test. The results show that the Spearman's coefficient (rs) between lab assay and field static test is 0.975 (p = 0.005) for diatom and 0.949 (p = 0.014) for Ulva spore respectively, which are significant at the 95% probability level. This indicates that the lab static assays using diatom and Ulva spore have good agreement with field static test. For dynamic performance evaluation, the rs between diatoms adhesion assay and field dynamic test is 0.894 (p = 0.041) while the rs for Ulva spore is 0.289 (p = 0.638), indicating the lab dynamic assay with diatom is accordance with the field dynamic test. Therefore, diatom was used to evaluate the performance of coating materials which exhibits the satisfactory correlation and consistency between lab assessment and field test, confirming that diatom is an adapted evaluation organism to evaluate FR coatings. 相似文献
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Testing for soil phosphate (P) using the Colwell procedure is widely used in south-western Australia to estimate fertilizer applications required for crops and pastures. The relationship between plant yield, expressed as a percentage of the maximum yield, and soil test values is assumed to be constant in different years for the same soil type and plant species. Data from 11 long-term field experiments in south-western Australia show that regardless of whether percentage of maximum or absolute yield is used, the relationship between yield and soil test values is different (1)in different years, for the same site and where the same P fertilizer type has been used. This occurred irrespective of whether the same or different plant species were grown in different years; (2)where different types of P fertilizer had been used, for the same site, same year and same plant species; (3)for different plant species, for the same site, same year, and same type of P fertilizer. We conclude that considerable errors in the recommendation of fertilizer rates may result from the assumption that there is a constant relationship between soil test and yield. 相似文献