电解磷化工艺探究及其应用

发布时间：2018-08-02 07:45

【摘要】：磷化处理在现代钢铁工业领域的应用非常广泛。现有的传统磷化工艺虽然比较成熟,但仍然存在消耗量大、环境污染严重等问题。随着环保低碳经济的发展,急需开发一种低消耗、低污染、高效率的磷化处理技术。鉴于此,本文针对传统磷化处理工艺进行改进,开发了一种电解磷化处理工艺,研究了磷化液的成分、电解磷化参数等对电解磷化膜的形貌、相结构及耐腐蚀性能的影响,考察了最优的电解磷化工艺在钢丝拉拔生产现场的应用情况。论文以高碳钢为研究对象,通过正交试验对其电解磷化工艺参数进行了优化。通过对磷化膜的性能进行综合评定,得到了最优的电解磷化处理工艺参数：电解时间为60 s,磷化液的总酸值为110 pt,电解电流为0.4 A,电解磷化液温度为25℃。此外,开发了一种新型环保高效的磷化液,其最优配方为：磷酸147 g/L,氧化锌75.5 g/L,硝酸钙320g/L,柠檬酸14 g/L,酒石酸2 g/L,硝酸钠1 g/L,氟硅酸1 g/L,硝酸镍为2g/L。对在最优工艺条件下制备的磷化膜进行测试,发现电解磷化膜的外观、厚度以及耐蚀性能均能达到要求。利用SEM、XRD对磷化膜进行微观形貌及物相分析,发现磷化膜中磷酸盐晶体呈颗粒状致密分布,磷化膜对基体的覆盖率高,且其主要由Zn3(PO4)2·4H2O相组成。为了验证实验得出的电解磷化处理技术的可行性,作者将研究的磷化液及其工艺技术在某企业钢丝拉拔生产线现场进行了试用。首先依据实验结论对钢丝进行电解磷化处理,对现场流程中的一些参数进行检测记录,并与该生产线原来使用的磷化技术进行对比,着重分析了两种磷化处理工艺流程、磷化液消耗量、能源消耗、成本、磷化膜外观和厚度等方面内容。结果发现,该电解磷化处理技术具有无酸洗、磷化液消耗量低、无需加热以及效率高等优势,在节省了大量成本的同时减少了污染物排放。此外,得到的磷化膜外观致密均匀,厚度与耐蚀性均符合要求。总之,论文开发的电解磷化处理技术在钢丝拉拔以及涂装预处理等领域都有着光明的应用前景。
[Abstract]:Phosphating is widely used in the field of modern iron and steel industry. Although the existing traditional phosphating process is mature, there are still some problems such as high consumption and serious environmental pollution. With the development of environmental protection and low carbon economy, it is urgent to develop a phosphating technology with low consumption, low pollution and high efficiency. In view of this, an electrolytic phosphating process was developed to improve the traditional phosphating process. The effects of the composition of phosphating solution and the parameters of electrolytic phosphating on the morphology, phase structure and corrosion resistance of the electrophosphating film were studied. The application of the optimal electrolytic phosphating process in the steel wire drawing production site was investigated. In this paper, the process parameters of electrolytic phosphating of high carbon steel were optimized by orthogonal test. Through the comprehensive evaluation of the properties of the phosphating film, the optimum technological parameters of electrolysis phosphating were obtained: the electrolysis time was 60 s, the total acid value of the phosphating liquid was 110 pt, the electrolytic current was 0.4 A, and the temperature of the electrolytic phosphating solution was 25 鈩，

本文编号：2158695