有机硅烷化处理钢片表面的研究

发布时间：2018-05-08 20:04

  本文选题：金属腐蚀防护 + 硅烷化处理　； 参考：《长春工业大学》2015年硕士论文

【摘要】：钢铁是重要的结构工程材料,应用领域极其广泛。当钢铁处于应用环境中时,会受到腐蚀介质对其造成的腐蚀破坏。由于钢铁的腐蚀会对社会的生产生活造成巨大的经济损失,甚至埋下重大的安全隐患,因此,开发钢铁腐蚀防护体系对于其工业应用具有重要意义。目前,金属表面防护效果最好的技术是铬酸盐钝化技术以及磷酸盐转化膜技术。但这两种技术因为毒性大、耗能高、污染环境,已不适应现代工业的发展方向。因此,近年来出现的有机硅烷化处理技术——一种新型节能环保技术得以快速发展。将有机硅烷化处理技术应用于金属表面防护,得到了世界各国科学家和工程师的广泛研究和关注,虽已取得一定成果,部分技术已得到工业应用,如汽车涂装生产线。但对硅烷试剂的水解条件与失效的研究还有待于进一步研究。本论文针对当前钢铁表面硅烷化处理工艺中存在的问题及现状,在前人研究的基础上,选用乙烯基三乙酰氧基硅烷(VTAS)和双-三乙氧基硅丙基胺(BTSPA)这两种硅烷偶联剂,研究了适用于钢铁的硅烷试剂水解工艺条件,对成膜工艺条件进行了优化。通过电化学测试确定了硅烷水解条件为：BTSPA硅烷最佳水解条件：硅烷含量3mL,醇水比20：80,pH 7,温度20℃；BTSPA和VTAS混合硅烷最佳水解条件：硅烷含量8mL,醇水比80：15,pH4,温度25℃。成膜工艺条件为：浸涂时间为60秒,固化温度为100℃,固化时间为30分钟。涂覆后的钢片表面耐蚀性能明显提高。
[Abstract]:Steel is an important structural engineering material, which is widely used in many fields. When steel is in application environment, it will be damaged by corrosion medium. Since the corrosion of iron and steel will cause huge economic loss to the production and life of the society, and even bury a great hidden danger of safety, it is of great significance to develop the corrosion protection system of iron and steel for its industrial application. At present, chromate passivation and phosphate conversion film are the most effective technologies for metal surface protection. However, these two technologies are not suitable for the development of modern industry because of their high toxicity, high energy consumption and environmental pollution. Therefore, the organic silane treatment technology, a new energy-saving and environmental protection technology, has been developed rapidly in recent years. The application of organosilane treatment technology to metal surface protection has been extensively studied and concerned by scientists and engineers all over the world. Although certain achievements have been made, some of the technologies have been applied in industry, such as automobile coating production line. However, the hydrolysis conditions and failure of silane reagents need to be further studied. In this paper, aiming at the existing problems and present situation of silane treatment on steel surface, two silane coupling agents, vinyl triacetylsilane (VTAS) and bis-triethoxysilylpropylamine (BTSPA), were selected on the basis of previous studies. The hydrolysis conditions of silane reagents suitable for iron and steel were studied and the process conditions of film formation were optimized. The optimum hydrolysis conditions of silane were determined by electrochemical test: the content of silane was 3 mL, the ratio of alcohol to water was 20: 80, pH 7, and the temperature was 20 鈩，

本文编号：1862852