颜填料对EP改性有机硅粘接涂层耐高温性能和防腐性能的影响

以环氧树脂(EP)改性有机硅树脂作为基体树脂,通过加入锌铬黄和铁红等填料,配制成一种耐高温、防腐蚀性的粘接底层;以有机硅树脂为基体树脂,通过加入锐钛型钛白粉和纳米SiO2,配制成具有一定遮盖力和耐高温性能的粘接面层。对涂敷底层和面层的马口铁试片进行耐高温性能和耐腐蚀性能测试,并采用金相显微镜和扫描探针分别对底层、面层和(含底层/面层的)双层粘接涂层的微观结构进行表征。结果表明:当底层中的颜基比为1.4∶1时,粘接涂层可耐400℃高温,在各种介质中浸泡72h后,粘接涂层表面没有开裂现象;当底层中的颜基比为1.7∶1时,其填料在树脂中分散得比较均匀,两者间的结合效果较好,该粘接涂层可耐400℃高温,但耐腐蚀性能相对较差。     

环氧树脂地板地坪涂层研究成功

新近研制成功的一种环氧树脂地板地坪涂层,其包括三层,底层、中层和面层,底涂层设置在地基层表面之上,底涂层干燥后,涂设中层,中层干燥后涂设面层。本实用新型应用于工业厂房装配车间等各种厂房内,具有强度高、耐磨、附着力强、不易老化、不易龟裂、整体无缝、防尘、耐油污、防化学溶剂、耐腐蚀、整体亮丽美观、且易清洁等优点。     

涂料和涂膜的检验、分析及评价

200912114 用荧光指示剂监测涂覆的铝2024-T4上的底层腐蚀[刊，英]／Liu，G．等／／Journal of the Electrochemical Society 2009，156（4），C160-C166根据引发腐蚀反应的敏感的变化，用荧光指示剂（FI）监测金属基材上的底层腐蚀。选用香豆素衍生物作荧光指示剂，将其添加到环氧一聚酰胺涂覆的铝涂层体系中。涂层体系的最初状态在UV光下呈荧光色，在腐蚀部位改变成非荧光色。     

无铬锌铝涂层的研究进展研究

介绍了无铬锌铝涂层的工艺流程、防腐蚀机理、膜层性能特点,以及国内外研究概况和应用领域,并对无铬锌铝涂层技术的发展提出了展望。     

新型无铬锌铝合金涂层的研究进展

无铬锌铝合金涂层作为一种新型的"绿色电镀"工艺,由于其优良的防护性、渗透性、无氢脆、耐高温等优点,成为一种有望取代镀锌层的清洁技术。本文对锌铝涂层及无铬锌铝涂层在国内外研究状况进行了简介,重点介绍了国内对无铬钝化剂及有机成膜剂的研究,展望了无铬技术的发展。     

纳米涂层材料建功多个领域

北京矿冶研究总院在对纳米锚粉深入研究的基础上，在开发出“纳米铝粉包覆的复合型镍铝涂层材料”之后，又研制成功了“纳米铝粉包覆的复合型系列涂层材料”。该系列涂层材料包括双组分中间化合物镍铝、三组分化合物镍铬铝、多组分化合物镍铬铝钴氧化钇、铁铬镍铝碳化钨等耐磨、耐蚀和耐高温的而层和底层材料，其特点是性能明显优于国外同类产品，而成本却显著的降低，     

喷铝层与石墨敷底层的相互作用

使用耐热防蚀涂层是电弧炉熔炼金属时,节约石墨电极的一个有发展前途的方法。在电极侧表面喷涂多层含铝量高(>75％)的易熔涂层的做法,得到普遍推广。此种涂层的内层是利用压缩空气喷涂的熔融铝,喷涂后进行短时间的电弧处理。保护层的使用效果取决于一系列因素,其中最重要的是与涂层材料的结合强度。本文要探讨的问题是,铝涂层在喷涂及电弧处理时与石墨敷底层结合的结构与机理。用ЭТОА号电极石墨作敷底层。铝层是利用线绕的电弧金属喷枪喷涂,操作参数为:敷底层t=100℃;喷涂距离120毫米;喷铝层厚度0.12毫米。冷却到室温后,喷铝层在1350、1500、     

环保硅钢绝缘涂层的研究进展

随着人们对环境保护的日益重视,硅钢涂层正逐步朝着无铬的方向发展。介绍了磷酸盐涂层、钼酸盐涂层、稀土元素涂层和新型涂层等环保硅钢绝缘涂层及硅钢硅酸镁底层的特点及研究进展。     

电工钢表面耐高温绝缘无机涂层的制备和表征

以磷酸和氢氧化铝为原料在90～100℃合成二聚磷酸三氢铝,将硅酸钠,草酸按一定比例加入到二聚磷酸三氢铝溶液中制备成粘度为0.16～0.2Pa.s的涂液。用浸渍提拉法在清洗过的电工钢表面涂覆,自然干燥12h后,经退火炉在600℃热处理1min得到耐高温绝缘涂层。用X射线衍射分析(XRD)、差热分析(DTA)、热重分析(TG)及显微镜研究了涂层组成变化。用Franklin烧损试验表征了涂层的绝缘能力。结果表明,磷酸和氢氧化铝比例为3.3∶1时生成二聚磷酸三氢铝产率最高,性能最稳定。硅酸钠的加入既可以加强涂层的结合力又可以改善涂液的分散性。螯合剂的加入使涂料稳定存放。涂层在300℃稳定使用。最高使用温度可达600℃。     

氧化钇稳定氧化锆涂层的研究现状

由于氧化钇稳定氧化锆(YSZ)陶瓷材料在作为热障涂层的使用过程中存在因抗烧结性能差、应力裂纹、涂层脱落等导致涂层失效的问题,本文主要从热障涂层的制备工艺,抗烧结性能、控制TGO的生长、抗CMAS腐蚀及YSZ面层应变容限等方面的改善方法进行论述,通过提高涂层纯度、改变粘接层及涂层成分、涂层结构及制备柱状结构YSZ陶瓷面层释放热失配应力等可有效改善涂层在使用过程中的失效问题。     

Resistance of metallic substrates protected by an organic coating containing aluminum powder

The corrosion behavior of an epoxy primer containing aluminum powder (10 vol.%) applied on carbon steel and on galvanized steel was examined by electrochemical impedance spectroscopy (EIS). The data show that this coating is more protective when applied onto carbon steel substrates, and that on galvanized steel thicker coatings allow to achieve similar protection levels as those obtained for carbon steel. These effects are probably due to aluminum pigments providing a cathodic protection of the substrate, and to the resulting products precipitating inside the pores of the polymeric coating. Three stages can be distinguished during exposure of the coated specimens. Upon immersion of the coated samples in the test solution, a pre-saturated stage is observed. After a certain period of immersion, which strongly depends on the thickness of the applied coating, a saturation stage is reached in which an effective protection of the metallic substrate against corrosion is achieved. Finally, at sufficiently long exposure times, swelling through the coating eventually leads to the detachment of the coating.     

溶胶-凝胶法制备不锈钢表面SiO2-TiO2-Al2O3-ZrO2涂层

在乙醇中,分别以盐酸、醋酸为催化剂,以正硅酸乙酯、钛酸正丁酯、硝酸铝、氧氯化锆为金属醇盐前躯体,通过分步水解法制备了SiO2-TiO2-Al2O3-ZrO2复合溶胶,利用浸渍法将陈化后的复合溶胶涂覆到不锈钢表面制得透明的复合涂层。对SiO2-TiO2-Al2O3-ZrO2复合涂层进行了差热分析(DTA)、失重分析(TG)、红外光谱(IR)、X射线衍射分析(XRD)以及耐HCl、CuSO4和FeCl3溶液浸泡腐蚀实验。结果表明,涂层中存在TiO、SiO、AlO键的氧化物网状结构,其XRD图中出现了锐钛矿和板钛矿的相结构。该涂层致密,具有良好的耐蚀性能。     

Low-Cost Biobased Coatings for AM60 Magnesium Alloys for Food Contact and Harsh Environment Applications

Low-cost, environmentally friendly and easily applicable coating for Mg alloys, able to resist in real world conditions, are studied. Coatings already used for other metals (aluminum, steel) and never tested on Mg alloy for its different surface and reactivity were deposited on AM60 magnesium alloys to facilitate their technological applications, also in presence of chemically aggressive conditions. A biobased PA11 powder coating was compared to synthetic silicon-based and polyester coatings, producing lab scale samples, probed by drop deposition tests and dipping in increasingly aggressive, salty, basic and acid solutions, at RT and at higher temperatures. Coatings were analyzed by SEM/EDX to assess their morphology and compositions, by optical and IR-ATR microscopy analyses, before and after the drop tests. Migration analyses from the samples were performed by immersion tests using food simulants followed by ICP-OES analysis of the recovered simulant to explore applications also in the food contact field. A 30 μm thick white lacquer and a 120 μm PA11 coating resulted the best solutions. The thinner siliconic and lacquer coatings, appearing brittle and thin in the SEM analysis, failed some drop and/or dipping test, with damages especially at the edges. The larger thickness is thus the unique solution for edgy or pointy samples. Finally, coffee cups in AM60 alloy were produced, as real word prototypes, with the best performing coatings and tested for both migration by dipping, simulating also real world aging (2 h in acetic acid at 70° and 24 h in hot coffee at 60 °C): PA11 resulted stable in all the tests and no migration of toxic metals was observed, resulting a promising candidate for many real world application in chemically aggressive environments and also food and beverage related applications.     

镀锌层单宁酸钝化膜的耐蚀性

为提高镀锌层的耐蚀性,以氟钛酸钾、双氧水、硝酸为辅助成分,制备了单宁酸钝化液,并对低碳钢上的碱性镀锌层进行了钝化处理.通过质量分数为5%的NaCl溶液浸泡试验,确定了最佳钝化液组成和钝化工艺条件为:单宁酸40 g/L,HNO3 5 mL/L,氟钛酸钾10g/L,H2O2 60 mL/L,温度25℃,时间20～30 s....     

Effects of coating thickness and surface treatment on the corrosion protection of diglycidyl ether bisphenol-A based epoxy coated carbon steel

The corrosion resistance of carbon steel specimens was compared, using different surface treatment methods such as blasting and zinc phosphate treatment on carbon steel followed by application of different coating thickness. Specimen surface morphology was observed by SEM. The corrosion performance of epoxy coated carbon steel was examined by electrochemical impedance spectroscopy (EIS), along with immersion test in 0.5N-NaCl solution and NORSOK M 501 cyclic test, respectively. EIS results showed that higher thickness of epoxy coating and zinc phosphate treatment on carbon steel showed better corrosion protection than rest of the specimens. Specimens with no treatment and blasting treatment followed by epoxy coating, showed poor corrosion protection. Results of NORSOK M 501 cyclic test showed similar trend as those of EIS results however degradation of specimens was more severe than those from immersion test.     

无取向硅钢用磷酸盐涂层材料 制备及其防腐性能

系统研究了无取向硅钢用磷酸盐系涂层性能的影响因素。以氢氧化铝和磷酸为原料制备磷酸二氢铝,再添加适量的添加剂酒石酸铵、二氧化硅、环氧树脂,得到的涂液涂布于硅钢表面,并控制合适的烘干温度,通过耐盐雾实验考察各因素对涂液耐腐蚀性能的影响。实验结果表明,在磷酸与氢氧化铝物质的量比为3.4∶1、酒石酸铵用量为2%、二氧化硅用量为1%、环氧树脂用量为5%、烘干温度为300 ℃条件下,所得涂层材料的防（耐）腐蚀效果最佳。     

用羧酸铝和硅溶胶制备莫来石纤维

采用金属铝粉、甲酸和醋酸为原料,以氯化铝为催化剂制备了羧酸铝溶液。在羧酸铝溶液中加入硅溶胶,制备了可纺的前躯体溶胶。凝胶纤维在1400℃煅烧后,主要物相为莫来石,有少量的氧化铝和氧化硅相,得到的纤维直径均匀,但纤维表面有较多的裂纹。     

Effect of Cu strike coating on adhesion between Cu–Sn coated steel and rubber

In order to improve the adhesion between steel and rubber, a novel coating deposition technique has been developed, where steel substrate with orchestrated surface roughness was coated with double-layer coatings consisting of a thin Cu strike layer followed by a Cu–Sn layer with varying Sn compositions by immersion route. Coating surface characteristics studied using scanning electron microscope coupled with energy dispersion spectroscopy analyzer, electron probe micro analyzer, and inductively coupled plasma optical emission spectroscopy showed improvement in surface coverage with coating after employing the strike layer coating attributed to the better coating penetration in the deep roughness troughs. Peel test of the coated samples vulcanized with styrene butadiene rubber (SBR) was carried out which showed improvement in adhesion strength of the double-layer-coated samples inferring more uniform Cu-sulfide layer formation at interface due to more uniform coating coverage in these samples. Highest peel strength with uniform cohesive fracture within rubber was observed for optimum 2–3?wt% Sn content in the coatings. This result was further supported by pull-out test conducted on coated wire samples vulcanized with SBR.     

水性环氧树脂固化剂的制备及其与乳液相容性的研究

以液态环氧树脂E-51和乙二胺为原料,成功制得一种水性环氧固化剂,并用冰醋酸中和成盐。通过控制冰醋酸的加量,调节产物的亲水亲油值,使其能与自制的水性环氧树脂乳液复配制备环氧树脂涂料;并研究了固化剂与乳液的相容性。采用FT-IR、 ¹H-NMR、环氧值表征固化剂结构。测试了涂膜的动态力学性能、热力学性能、平衡吸水率、耐酸碱性、铅笔硬度等。结果表明:当中和度为50%时,涂膜的力学性能、耐水性、耐酸碱性、硬度均较好。     

镀液组成对硅钢表面高硅涂层形貌与性能的影响

在硅钢表面复合电镀高硅涂层,再通过扩散退火制备高硅电工钢。采用正交试验优化得到镀液组成为:FeCl_2·4H_2O 350g/L,硅粒子30g/L,KI 3g/L。实验结果表明:pH值对涂层表面裂纹有影响,当pH值为1.3时涂层表面没有裂纹,其中硅的质量分数为29.84%。1 000℃下扩散退火3h,样品的铁损P2/1k从4.49W/kg降到3.64W/kg,饱和磁感应强度B8从1.67T回升到1.79T。