耐磨损和耐硫酸腐蚀涂层的研究

发布时间：2018-02-23 21:28

本文关键词： 集装箱涂层硫磺腐蚀磨损　出处：《华东理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：集装箱是较为常见的一种运输工具。在运送货物的过程中,集装箱的内面漆与货物直接接触,需要有较好的耐腐蚀性能。常见的集装箱涂层是环氧富锌底漆在内的三层涂层,可以用于运送腐蚀性不强的货物。本文着重研究装载硫磺的集装箱内面涂层的失效机理,同时对比多种涂层的耐硫酸腐蚀性能和耐磨损性能,选取耐硫酸腐蚀性能较好的聚合物X涂层进行改良,提高其耐磨损性能。当集装箱用于运送颗粒状硫磺时,一段时间后发现内面涂层发生腐蚀磨损,部分区域甚至出现腐蚀穿透现象。研究表明,集装箱的腐蚀机理为硫化物的氧化和水合铁离子的水解,而粒状硫磺在运输过程中对地面产生磨损,腐蚀和磨损共同作用下导致集装箱内面漆的过早失效。需要研究一种耐硫酸腐蚀性能和耐磨损性能优良的涂层,同时,涂层要符合施工工艺简便和低成本的要求。通过对比多种性能优异的涂层在腐蚀和磨损条件下的表现,发现聚合物X涂层的耐硫酸腐蚀性能最好,但耐磨损性能不高。聚合物X涂料属于有机涂料,从增韧、填料、润滑方面出发,在聚合物X涂层中添加聚氨酯、增韧剂、Si02、石墨等,在尽量不改变其耐硫酸腐蚀性能的前提下,提高其耐磨损性能。研究表明,只有通过添加石墨,才能使得改良后的聚合物X涂层的耐磨损性能得到较大提高。涂层添加石墨后,摩擦表面的形貌平滑,有效防止涂层粘连,降低磨损量。而添加石墨后涂层耐硫酸性能有略微下降。通过红外光谱分析发现,石墨颗粒与聚合物X涂料是机械混合,没有产生化学反应。因此,添加石墨使得涂层表面存在间隙,离子运输通道的形成时间缩短,耐腐蚀性能下降。石墨-聚合物X涂层的提出有希望为装载硫磺集装箱内面漆失效问题提供一种有效的解决方案。
[Abstract]:Container is a common means of transport. In the process of transporting the goods, the inner paint of the container is in direct contact with the cargo and requires better corrosion resistance. The common container coating is three coatings including epoxy zinc rich primer, In this paper, the failure mechanism of the inner coating of container containing sulfur is studied, and the corrosion resistance and wear resistance of various coatings are compared. The polymer X coating with good corrosion resistance to sulfuric acid was selected to improve its wear resistance. When the container was used to transport granular sulfur, corrosion and wear of the inner coating was found after a period of time. The corrosion mechanism of containers is the oxidation of sulfides and hydrolysis of hydrated iron ions, while granular sulfur causes wear on the ground during transportation. Corrosion and wear together lead to premature failure of container interior paint. It is necessary to study a coating with good corrosion resistance and wear resistance of sulfuric acid, at the same time, The coating should meet the requirements of simple construction and low cost. By comparing the performance of many excellent coatings under corrosion and wear conditions, it is found that polymer X coating has the best corrosion resistance to sulfuric acid. But the wear resistance is not high. The polymer X coating is an organic coating. From the aspects of toughening, packing and lubrication, adding polyurethane, toughening agent Si02, graphite and so on in the polymer X coating, without changing its sulfuric acid corrosion resistance as far as possible, The study shows that the wear resistance of the modified polymer X coating can be greatly improved only by adding graphite. After adding graphite, the surface morphology of the friction surface is smooth, and the adhesion of the coating is effectively prevented. The sulphuric acid resistance of the coating decreased slightly after adding graphite. Infrared spectroscopy showed that graphite particles were mechanically mixed with polymer X coating, and there was no chemical reaction. The addition of graphite resulted in a gap on the surface of the coating, and the formation time of the ion transport channel was shortened. The introduction of graphite-polymer X coating is expected to provide an effective solution to the failure of sulphur container interior paint.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG174.4

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