有机缓蚀剂的缓蚀性能及其复配性能研究

发布时间：2019-02-23 16:42

【摘要】：随着水资源短缺和污染日趋严重,对工业水处理技术提出挑战。由于使用有机磷酸类化合物作为水处理阻垢剂,会引起磷对环境水域的富营养化,促进菌藻生长而造成水源污染。因此,绿色水处理技术迅速发展,聚环氧琥珀酸为代表的绿色水处理阻垢剂已成为当前最有代表性的阻垢剂产品发展方向。此外,缓蚀剂对金属防腐蚀具有很大作用,本文旨在研究有机含氮类缓蚀剂在酸性条件下对金属的缓蚀作用,以期得到几类缓蚀剂及其配方的协同作用。本文以顺丁烯二酸酐为原料,合成了新型绿色阻垢剂聚环氧琥珀酸(PESA),并对其结构进行红外表征。利用静态阻垢法评价了PESA的阻垢性能,为PESA的阻垢性提供了理论和实验上的依据。实验得出单独使用PESA的最佳投加量,并通过研究PESA与PBTC、HEDP、118A和8483复配协同作用,得出了以PESA为主剂的最佳配方,使配方阻垢率可达98.8%。本文在醋酸、醋酸与对氨基苯磺酸复合掺杂的条件下,以苯胺及其衍生物为主要原料,制备了水溶性聚苯胺,从反应物的配比(摩尔比),单体与氧化剂浓度,以及反应温度、引发剂等因素的影响出发,通过缓蚀性能研究确定了合成条件。其中,HAc掺杂水溶性聚苯胺的合成条件为:以醋酸为引发剂,反应的最佳条件是:苯胺与衍生物的摩尔比为1:3,单体浓度为0.5mol/L,过硫酸铵与单体的摩尔比为0.8:1,反应温度为5℃。HAc/SAA掺杂水溶性聚苯胺的合成条件为:以醋酸、对氨基苯磺酸的复合物为引发剂,得到了反应最佳条件是:苯胺与衍生物的摩尔比为1:3,单体浓度为0.5mol/L,过硫酸铵与苯胺单体的摩尔比为0.8:1,当反应温度为0℃时,制得的水溶性聚苯胺对碳钢的缓蚀率可达到85.6%。考察了HAc/SAA掺杂的水溶性聚苯胺与其它缓蚀剂复配作用,结果表明,复配后缓蚀效果提高,六次甲基四胺与HAc/SAA掺杂水溶性聚苯胺的复配,缓蚀效率可达93.2%。本文通过失重法和极化曲线等方法研究硫脲、氨基硫脲及其HAc/SAA-PANI复配物在酸性腐蚀体系中对碳钢和不锈钢的缓蚀性能。通过在酸性溶液中不同的挂片时间,不同的挂片温度,不同的缓蚀剂浓度的研究,寻找出单一硫脲及氨基硫脲的最佳缓蚀时间、温度及最佳缓蚀浓度。并且对硫脲和氨基硫脲对不同材料缓蚀性能的比较,得出硫脲较氨基硫脲对碳钢和不锈钢的缓蚀性好。还考察了40℃条件下,硫脲、氨基硫脲及其相应的复配物对两种金属材料的缓蚀性能,结果表明,硫脲及其与HAc/SAA-PANI复配物对碳钢、不锈钢的缓蚀性能均优于氨基硫脲及其复配物。
[Abstract]:With the shortage and pollution of water resources becoming more and more serious, the technology of industrial water treatment is challenged. The use of organophosphoric acid compounds as scale inhibitor for water treatment will lead to eutrophication of phosphorus in environmental waters and promote the growth of bacteria and algae and lead to water pollution. Therefore, the green water treatment technology is developing rapidly, and the green water treatment inhibitor represented by polyepoxy succinic acid has become the most representative development direction of scale inhibitor products. In addition, the corrosion inhibitor has a great effect on metal corrosion. The purpose of this paper is to study the corrosion inhibition of organic nitrogen-containing corrosion inhibitors on metals under acidic conditions, in order to obtain several kinds of corrosion inhibitors and their synergistic effects. In this paper, a new green scale inhibitor, poly (epoxy succinic acid) (PESA), was synthesized from maleic anhydride and its structure was characterized by IR. The scale inhibition performance of PESA is evaluated by static scale inhibition method, which provides theoretical and experimental basis for scale inhibition of PESA. By studying the synergistic effect of PESA, PBTC,HEDP,118A and 8483, the optimum formulation of PESA as the main agent is obtained, and the scale inhibition rate of the formula can reach 98.8%. In this paper, water-soluble Polyaniline was prepared from aniline and its derivatives under the condition of acetic acid, acetic acid and p-aminobenzenesulfonic acid as the main raw materials. The ratio of reactants (molar ratio), the concentration of monomer and oxidant, and the reaction temperature were studied. Based on the influence of the initiator and other factors, the synthetic conditions were determined through the study of corrosion inhibition performance. The optimum conditions for the synthesis of water-soluble Polyaniline doped with HAc are as follows: the molar ratio of aniline to derivative is 1: 3, and the monomer concentration is 0.5 mol / L, using acetic acid as initiator. The molar ratio of ammonium persulfate to monomer is 0.8: 1 and the reaction temperature is 5 鈩，

本文编号：2429015