苯并三氮唑复合缓蚀阻垢剂的制备及性能研究

发布时间：2018-04-26 09:31

本文选题：循环冷却水 + 无磷　；参考：《武汉理工大学》2013年硕士论文

【摘要】：近年来随着水处理剂行业的发展,苯并三氮唑开始被用于碳钢及其它金属的缓蚀。目前国内外关于苯并三氮唑用于碳钢缓蚀的报道相对较少,对其缓蚀机理的研究也不够深入。为了进一步研究苯并三氮唑对碳钢的缓蚀作用,同时有效解决工业循环冷却水系统的腐蚀和结垢,本文以苯并三氮唑(BTA)、丙烯酸-2-丙烯酰胺基-2-甲基丙磺酸(AA/AMPS)、硫酸锌、水解聚马来酸酐(HPMA)、葡萄糖酸钠为原料进行复配,开发出一种无磷、高效的复合缓蚀阻垢剂。本文通过正交试验法筛选出复合缓蚀阻垢剂各组分的最佳投加量,分别通过旋转挂片腐蚀实验和静态阻垢实验测定最佳配方的缓蚀和阻垢性能,并对最佳配方进行经济环境效益分析。通过极化曲线法、交流阻抗法、电镜扫描(SEM)法、X-射线衍射(XRD)法对复合缓蚀阻垢剂的缓蚀和阻垢机理进行研究。实验结果如下： (1)当BTA单一组分的投加量为100mg/L时对碳钢起到明显的缓蚀作用,缓蚀率可达到94.61%；阻垢测试结果表明BTA对碳酸钙的阻垢作用不明显。 (2)正交试验筛选出的复合缓蚀阻垢剂各组分的最佳投加量分别为：BTAAA/AMPS6mg/L、硫酸锌3mg/L、HPMA6mg/L、葡萄糖酸钠10mg/L。最佳复合缓蚀阻垢剂的缓蚀率可达到92.02%,阻垢率可达到90.42%,缓蚀阻垢性能优良。 (3)分散氧化铁评定实验表明复合缓蚀阻垢剂对氧化铁具有良好的分散性能,能够有效抑制氧化铁的沉积。 (4)通过经济环境效益分析表明该复合缓蚀阻垢剂具有取代磷系缓蚀阻垢剂的可能性,且对环境没有明显危害。 (5)通过极化曲线和交流阻抗图分析可知,该复合缓蚀阻垢剂是一种以抑制阳极极化为主的缓蚀阻垢剂。通过扫描电镜分析可知,该复合缓蚀阻垢剂能够在碳钢表面形成一层保护膜,从而起到有效抑制碳钢腐蚀的作用。通过XRD测试及扫描电镜测试分析可知,该复合缓蚀阻垢剂能够破坏碳酸钙晶格的结构,抑制晶体的正常生长,同时能够分散晶体,使生成的垢形状不规则且粒径较小,容易冲洗。
[Abstract]:In recent years, with the development of water treatment agent industry, benztriazole has been used to inhibit corrosion of carbon steel and other metals. At present, there are few reports about the application of benzotriazole in corrosion inhibition of carbon steel, and the study of corrosion inhibition mechanism of benztriazole is not enough. In order to further study the inhibition effect of benztriazole on carbon steel, and to effectively solve the corrosion and scaling of industrial circulating cooling water system, this paper deals with the corrosion and scaling of BTAA, Acrylic acid -2-acrylamido-2-methylpropanesulfonic acid and zinc sulfate. A kind of complex corrosion and scale inhibitor without phosphorus and high efficiency was developed by using hydrolyzed polymaleic anhydride (HPMA) and sodium gluconate as raw materials. In this paper, the optimum dosage of compound corrosion and scale inhibitor was selected by orthogonal test. The corrosion inhibition and scale inhibition properties of the best formula were determined by rotating hanging plate corrosion test and static scale inhibition experiment respectively. The economic and environmental benefits of the best formula were analyzed. The mechanism of corrosion inhibition and scale inhibition of composite corrosion and scale inhibitor was studied by polarization curve method, AC impedance method and scanning electron microscope scanning electron microscopy (SEM) method and X-ray diffraction (XRD) method. The results are as follows: (1) when the dosage of BTA single component is 100mg/L, the corrosion inhibition rate of carbon steel can reach 94.61.The result of scale inhibition test shows that the inhibition effect of BTA on calcium carbonate is not obvious. (2) the optimum dosage of compound corrosion and scale inhibitor selected by orthogonal test is: 1 BTAA / AMPS 6 mg / L, zinc sulfate 3 mg / L, HPMA 6 mg / L, sodium gluconate 10 mg / L. The corrosion inhibition rate of the best compound corrosion and scale inhibitor can reach 92.02 and the scale inhibition rate can reach 90.42, and the corrosion and scale inhibition performance is excellent. The evaluation experiment of dispersed iron oxide shows that the composite corrosion and scale inhibitor has good dispersion property to iron oxide and can effectively inhibit the deposition of iron oxide. 4) the economic and environmental benefit analysis shows that the compound corrosion and scale inhibitor has the possibility of replacing phosphorus series corrosion and scale inhibitor, and has no obvious harm to the environment. 5) through polarization curve and AC impedance diagram analysis, it is known that the composite corrosion and scale inhibitor is a kind of corrosion and scale inhibitor which mainly inhibits anodic polarization. The SEM analysis shows that the composite corrosion and scale inhibitor can form a protective film on the surface of carbon steel, which can effectively inhibit the corrosion of carbon steel. The results of XRD test and SEM analysis show that the composite corrosion and scale inhibitor can destroy the structure of calcium carbonate lattice, inhibit the normal growth of the crystal, and disperse the crystal, making the scale shape irregular and the particle size smaller. Easy to wash.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU991.2

【参考文献】