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ET-98无机磷酸盐富锌涂料性能与应用 总被引:7,自引:0,他引:7
本文论述了国内首创的ET-98无机磷酸盐富锌涂料,克服了无机硅酸盐富锌涂料喷砂、抛丸的缺点,简易可行,除油后即可涂刷,并达到最高防腐的功能。 相似文献
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以改善磷酸盐防腐涂料的常温固化性能为目的,采用磷酸二氢铝溶液作为粘结剂,氧化镁、氢氧化铝和二氧化硅作为填料,通过添加不同掺量的硅溶胶,使磷酸盐涂料在常温下固化成膜。对常温固化磷酸盐涂层进行了附着力测试和微观结构表征,并通过电化学测试研究了涂层在3.5%NaCl溶液中的腐蚀行为。结果表明,硅溶胶的加入使得涂层附着力增大,腐蚀电位正移,腐蚀电流密度降低,有效提高了涂层的耐蚀性能。其中,5.6%硅溶胶改性的磷酸盐涂层的腐蚀电流密度最低,腐蚀电位最正,极化电阻最大。经过720 h中性盐雾试验后,涂覆该涂层的Q235钢板基底表面依旧光亮且无腐蚀产物。 相似文献
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对木质地板用环氧树脂粉末涂料的研究进展进行分析。主要从三个研究方向即UV固化环氧粉末涂料、双重固化体系和对传统环氧树脂粉末涂料及其固化剂的改性,对木质地板用环氧粉末涂料低温固化技术进行了探讨。 相似文献
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文章以磷酸、氢氧化铝、去离子水为原料,通过严格控制加料比例,合成了以磷酸二氢铝为主体成份的磷酸铝类无机粘合剂。实验研究了CuO、Fe_2O_3、Cr_2O_3等三种金属氧化物与制备粘合剂的固化情况,采用剪切剥离强度、对接头拉伸强度等力学性能测试考察了其基本性能,并实验研究了少量活性MgO加入对三种固化体系的固化速度及固化强度的影响。 相似文献
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Reactivity of Aluminum Nitride Powder in Dilute Inorganic Acids 总被引:1,自引:0,他引:1
The reactivity of AlN powder in diluted inorganic acids was studied by measuring the pH and temperature during its hydrolysis. At very low starting pH (pH ∼1) no reaction was observed, regardless of the acid used. In contrast, in a less acidic environment, i.e., at higher pH values (pH ∼3), the reaction was fast enough to reveal the influence of different acids on the hydrolysis reaction. Monoprotonic acids which are completely dissociated (HCl, HF, HNO3 ), and form water-soluble salts with aluminum, did not influence the hydrolysis reactions. In the presence of incompletely dissociated diprotonic H2 SO4 and H2 CO3 acids which form water-soluble salts with aluminum, the reaction was hindered but not prevented. In the presence of phosphoric acid the hydrolysis was prevented at room temperature, presumably because of the formation of insoluble phosphates on the powder surface. At elevated temperatures their solubility was substantial, and the reactivity of AlN powder in a diluted hot phosphoric acid was reestablished. In the presence of silicic acid the reaction was suppressed at both room and elevated temperatures, which was also ascribed to the formation of insoluble silicates. The adsorption of silicate anions onto the powder surface was confirmed by chemical analysis and zeta potential measurement. Using DRIFT measurements, however, the presence of Si–O bonds on the powder could not be unambiguously confirmed, since the characteristic wavelengths for these bonds are in the region of very strong Al–N stretching frequencies. 相似文献