活化au -85铝合金在不同氧化环境下氧化产物的热分析

R. Sarmurzina, G. Boiko, U. Karabalin, D.А. Tiesov, N. P. Lyubchenko, N. Demeubayeva
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引用次数: 0

摘要

采用差热分析和热重分析的方法,测定了活化铝合金与各种氧化剂相互作用产物的多组分样品的热活性部分的组成,揭示了其在动态升温条件下的热行为。热分析在空气环境中进行,温度范围为20至1000°C。加热炉加热方式为线性(dT/ dT = 10 grad/min),参比物质为煅烧氧化铝。以水、3%过氧化氢水溶液、5%硫酸水溶液为氧化剂。根据热曲线的形貌和与之相关的热重线的热重读数的内热效应和放热效应强度的数值,建立了粉末样品活性部分的物质组成。在测试样品分解过程中显示的一系列内热效应和放热效应使遵循其热破坏阶段的顺序和定量确定挥发性组分的组成成为可能。根据热活性样品组分的组成和重量比,确定了样品分解的许多特征。通过对活化铝合金RAU-85在各种氧化环境下氧化产物的热分析数据,可以成功地应用于开发一种基于活化铝合金与地层水的热气-化学相互作用的沥青树脂石蜡沉积物井底区清洁技术,该技术会产生大量的热量和蒸汽-气体混合物。
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THERMAL ANALYSIS OF OXIDATION PRODUCTS OF ACTIVATED RAU-85 ALUMINUM ALLOY IN VARIOUS OXIDIZING ENVIRONMENTS
By methods of differential thermal and thermogravimetric analysis, the composition of the thermally active part of the studied multicomponent samples of the products of the interaction of the activated aluminum alloy with various oxidizers was determined, and their thermal behavior was revealed under conditions of dynamic temperature rise. Thermal analysis was carried out in air environment, in the temperature range from 20 to 1000°C. The heating mode of the furnace was linear (dT/dt = 10 grad/min), the reference substance was calcined Al2 O3 . Water, 3% aqueous solution of hydrogen peroxide, 5% aqueous solution of sulfuric acid were used as oxidizing agents. Establishment of the material composition of the active part of powder samples was carried out according to the morphologies of thermal curves and numerical values of the intensities of endo- and exothermic effects using the thermogravimetric readings of TG-lines associated with them. A series of endo- and exothermic effects revealed during the decomposition of the test samples made it possible to follow the order of the stage of their thermal destruction and quantitatively determine the composition of volatile components. A number of features of sample decomposition were established depending on their composition and weight ratios of thermally active sample components. The obtained data on the thermal analysis of the oxidation products of the activated alloy RAU-85 in various oxidizing environments can be successfully applied to develop a technology for cleaning the bottomhole zone of the well from asphalt resin paraffin deposits, based on the thermal gas-chemical interaction of the activated aluminum alloy and formation water, which results in the formation of a large amount of heat and vapor-gas mixture.
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