共查询到20条相似文献,搜索用时 109 毫秒
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西部原油、成品油管道工程涉及的范围很宽,地形复杂、气候多样。通过对腐蚀与防护问题的研究,采用目前较先进的防护涂层,即单层重防腐环氧粉末涂料及重防腐环氧粉末涂料作为底层的三层防腐结构相结合,最大限度地保护管道,阻缓管道腐蚀,通过对各种防护对策比较着重阐述防腐环氧粉末涂料制造,三层PE熔结环氧粉末涂料结构的特点及工艺。 相似文献
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环氧粉末涂料在跨海大桥钢管桩防腐的应用 总被引:2,自引:2,他引:2
通过研究对比采用目前较先进的防护涂层,即单层、双层及三层重防腐环氧粉末涂料防腐结构相结合,最大限度的保护杭州湾跨海大桥钢管桩,阻缓钢管桩腐蚀。着重阐述多层防腐环氧粉末涂料制造,多层结构的特点并设计说明工艺,结果表明功能性多层环氧防腐粉末涂料能够满足杭州湾跨海大桥钢管桩的防腐要求。 相似文献
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《中国石油和化工标准与质量》2019,(14):245-246
简要介绍管道防腐用环氧粉末涂料的组成、特性和喷涂原理,详细阐述了管道防腐中环氧粉末静电喷涂的工艺与注意事项,同时就环氧粉末涂装常见缺陷进行分析并提出相应的处置措施。 相似文献
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环氧粉末涂层对金属基材附着力的影响因素 总被引:1,自引:0,他引:1
环氧粉末涂料具有附着力好、耐腐蚀性强、耐温性能好等优点,在金属防腐特别是重防腐领域应用非常广泛。在环氧粉末涂层的诸多性能中,涂层对基材的附着力是非常重要的一项技术指标,也是满足其他性能的基础,附着力的好坏直接影响着涂层对基材的保护寿命。本文主要从喷涂温度、基材表面处理的表面粗糙度以及粉末涂料原材料等方面讨论了环氧涂层对金属基材表面附着力的影响因素。研究表明:喷涂温度提高有利于涂层附着力的提高,表面粗糙度提高且锚纹深度相对均匀有利于涂层附着力的提高,填料以及助剂的种类对附着力具有一定的影响。 相似文献
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本文根据目前环氧树脂,聚酯树脂的流变行为与粉末涂料生产工艺之间关系研究较少,而开展了对环氧树脂,聚酯树脂流变行为的探索实验。总结出一些规律,希望能够为粉末涂料生产工艺设计提供事实依据。 相似文献
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《Journal of the European Ceramic Society》2021,41(13):6772-6777
A supersaturated tungsten Ta-Hf-W-C solid solution coating is successfully prepared by a reactive plasma spraying. The reaction process and solution behavior of TaC-HfC-WC-C composite powder during induction plasma spheroidization (IPS) and vacuum plasma spraying (VPS) are described. Compared with the direct spraying, the coating made by IPS-VPS multi-stage plasma heating process has lower porosity and better composition uniformity. The highest hardness obtained by nanoindentation can reach up to 43.3 GPa due to solid solution strengthening. This work provides a new method and a potential material for thermal spraying super-hard coatings. 相似文献
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聚酯树脂粉末涂料的固化行为 总被引:1,自引:0,他引:1
用差示扫描量热法(DSC)对固态条件下聚酯/TGIC(triglycidyl isocyanurate)体系的非等温固化反应动力学进行了研究。根据DSC和热重(TG)的分析结果,对聚酯粉末的固化过程及热稳定性进行了探讨,通过温度-升温速率图外推法确定了该体系的凝胶温度、固化温度和后固化温度分别为113、146和195℃。采用Kissinger方程、Doyle-Ozawa方程和Crane方程对DSC数据进行分析,得到了固化反应的平均表观活化能65.71 kJ·mol-1,频率因子8.50×106 min-1、反应级数0.95,建立了该树脂体系的固化动力学模型。讨论了固化反应速率、固化度、固化温度与时间等关系的变化规律及影响因素,为优化铝型材用粉末涂料聚酯体系的固化工艺提供了理论基础。 相似文献
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粉末涂料以其特有的环保性和优异的涂装效果运用于多个领域,但常用的静电喷涂工艺会产生大量的粉尘,维护成本较高。本文主要研究一种粉末涂料的水性涂装工艺,重点考察了环氧聚酯型粉末涂料在水性涂装过程中不同消泡剂和不同烘烤条件等因素的影响。结果表明:当水粉比为( 0.65~0.75)∶1,硅油消泡剂添加量为 1.5%的涂料试板于 60 ℃干燥 3 min后以 10 ℃/min升温速率升至 180 ℃,固化 15 min,得到的涂层性能符合 HG/T 2006—2006要求,与静电喷涂效果基本一致。粉末涂料的水性涂装法工艺流程短、设备简单、操作便利、无粉尘污染,是一种环境友好、切实有效的涂装方法。 相似文献
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Influence of the size of spraying powders on the microstructure and corrosion resistance of Fe-based amorphous coating 总被引:2,自引:0,他引:2
The Fe-based amorphous coatings with the composition of Fe48Cr15Mo14C15B6Y2 were successfully sprayed on mild steel substrate by the high velocity oxygen fuel (HVOF) spraying process with different feedstock powder sizes (i.e., powder A: −33 + 20 μm, powder B: −45 + 33 μm, powder C: −55 + 45 μm). The coatings were characterized for its morphology, microstructure and thermal stability by using X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The corrosion behavior of the coatings in 3.5 wt% NaCl solution was studied with potentiodynamic and potentiostatic polarization test. It was found that the particle size of the feedstock powders had a significant influence on microstructure and corrosion resistance of the resultant coatings. The coatings sprayed with the finest powders show the most compact structure; while the coating with the coarser powders exhibits a better corrosion resistance. It is found that the corrosion resistance of the coatings is closely related to the wetting behavior which is affected by the oxygen content and the roughness of coatings. The coatings with hydrophobicity exhibit a better corrosion. The present result demonstrates that the amorphous coatings with hydrophobicity and excellent corrosion resistant are promising for industrial application in marine environment. 相似文献
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Zhengping Mao Jing Ma Jun Wang Baode Sun 《Journal of Coatings Technology and Research》2009,6(2):243-250
TiN-matrix coating was prepared by reactive high velocity oxygen fuel (HVOF) spraying on carbon steel based on the self-propagating
high temperature synthesis (SHS) technique in air. The phase composition, structures, and properties of TiN-matrix coating
were analyzed using XRD, EDS, SEM and Vickers microhardness equipment. The anti-corrosion property in nearly neutral 3.5 wt%
NaCl electrolytic solution was measured. The Weibull distribution of Vickers microhardness at different loads and their linear
fitting were analyzed. The apparent fracture toughness of the coating was also calculated. The coating is composed of main
phases (TiN, TiN0.3), minor phases (Ti2O3, TiO2), and porosity. The anti-corrosion property of an HVOF-sprayed TiN-matrix coating in electrolytic solution is superior to
that of AISI 316L stainless steel. The microhardness values from 1137HV0.05 to 825HV1 are relatively high and have indentation size effect (ISE). With the increment of m, which increases with the increment of applied load, the microhardness values are more concentrated. The average value of
apparent fracture toughness K
IC
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. It is higher than that of reactive plasma sprayed (RPS) TiN coating, which reflects the good toughness of a TiN-matrix coating
deposited by reactive HVOF spraying. 相似文献