固体清洗剂高温清洗缓蚀剂的研制

发布时间：2018-03-24 07:20

本文选题：高温　切入点：酸洗　出处：《辽宁师范大学》2016年硕士论文

【摘要】：碳钢,这种具有良好延展性且价格低廉的材料,被广泛应用于航海航天以及石油化工等领域。然而,在长期使用过程中,碳钢设备也会产生大量的介质积垢和铁锈,严重影响了碳钢设备的使用寿命。如何消除碳钢设备的介质积垢和铁锈是一项非常值得研究的课题,其中,酸洗是一种非常有效的除垢方法。由于在实际工程应用中,清洗环境较为复杂,因此,对缓蚀剂的性能要求较高。本文通过对大量的单组份缓蚀剂进行实验结果对比,筛选出了几种耐高温且性能良好的缓蚀剂,并采用正交实验法,进一步对筛选出的缓蚀剂进行了复配。通过反复实验,最终研制出三种耐高温、性能好的酸洗用缓蚀剂:JLL-1、JLL-2和JLL-3。本文利用失重法,分别对每种缓蚀剂在氨基磺酸、柠檬酸、EDTA高温体系中进行抗干扰性测试,绘制出了这三种缓蚀剂的浓度-金属腐蚀速率、清洗剂浓度-金属腐蚀速率、温度-金属腐蚀速率、时间-金属腐蚀速率等曲线。实验数据表明:在浓度为5%柠檬酸溶液中,摄氏90度条件下,当使用0.1 gJLL-1缓蚀剂时,碳钢的腐蚀速率可以降至0.65 g·m-2·h-1以下,这充分体现了 JLL-1缓蚀剂的缓蚀性能;进一步研究表明,JLL-1缓蚀剂可应用于高温条件下氨基磺酸对碳钢、柠檬酸对碳钢、EDTA对碳钢、EDTA对纯铝、柠檬酸对纯铝的酸洗用缓蚀剂;JLL-2缓蚀剂可用于高温条件下柠檬酸对碳钢、EDTA对碳钢、氨基磺酸对碳钢、柠檬酸对纯铝、EDTA对纯铝的酸洗用缓蚀剂;缓蚀剂JLL-3还可用于高温条件下氨基磺酸对不锈钢、氨基磺酸对纯铝、柠檬酸对纯铝、EDTA对纯铝的酸洗用缓蚀剂。本文还采用三电极系统,分别对缓蚀剂JLL-1、JLL-2和JLL-3在不同清洗剂不同温度下进行了电化学研究。实验数据显示:JLL-1是一种混合型缓蚀剂,JLL-2是一种阴极型缓蚀剂,而JLL-3是一种阳极型缓蚀剂。经反复实验证明,此三种缓蚀剂无毒无害、价格低廉,属于高效环保型缓蚀剂,具有广阔的市场前景。
[Abstract]:Carbon steel, which has good ductility and low cost, is widely used in navigation, aerospace, petrochemical and other fields. However, in the long-term use of carbon steel equipment will also produce a large number of media scale and rust. The service life of carbon steel equipment has been seriously affected. How to eliminate the medium fouling and rust of carbon steel equipment is a subject worth studying. Among them, pickling is a very effective method of scale removal. The cleaning environment is more complex, so the performance of corrosion inhibitor is very high. By comparing the experimental results of a large number of single-component corrosion inhibitors, several corrosion inhibitors with high temperature resistance and good performance are screened out, and the orthogonal test method is used. Through repeated experiments, three kinds of corrosion inhibitors for acid pickling with high temperature resistance and good performance were developed. In this paper, by using weightlessness method, each inhibitor was used in aminosulfonic acid. The anti-interference test was carried out in the citrate EDTA system, and the concentration of the three inhibitors, metal corrosion rate, cleaning agent concentration and metal corrosion rate, temperature and metal corrosion rate, were plotted. The experimental data show that the corrosion rate of carbon steel can be reduced to less than 0.65 g m-2 h-1 under the condition of 90 degrees Celsius and 0. 1 gJLL-1 corrosion inhibitor in 5% citric acid solution. The results show that the JLL-1 inhibitor can be applied to carbon steel at high temperature, and citric acid to carbon steel. The acid pickling inhibitor of citric acid can be used as corrosion inhibitor of citric acid for carbon steel EDTA for carbon steel, amino sulfonic acid for carbon steel, citric acid for pure aluminum and EDTA for pure aluminum at high temperature. The corrosion inhibitor JLL-3 can also be used as corrosion inhibitor for sulfamic acid for stainless steel, amino sulfonic acid for pure aluminum and citric acid for pure aluminum under high temperature. Electrochemical studies were carried out on the corrosion inhibitors JLL-1N JLL-2 and JLL-3 at different cleaning agents at different temperatures. The experimental data show that JLL-1 is a mixed inhibitor JLL-2 is a cathodic corrosion inhibitor, and JLL-3 is an anodic corrosion inhibitor. These three kinds of corrosion inhibitors are non-toxic and cheap. They belong to high efficiency and environmental protection type corrosion inhibitors and have broad market prospects.
【学位授予单位】：辽宁师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TG174.42

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