(论文 页数:8 字数:4545)摘要:对常温锌系磷化液进行了研究,讨论了促进剂及其浓度等工艺参数对磷化膜质量的影响。结果表明:此磷化液在常温下20min即可在钢铁表面上生成一层均匀、致密、耐腐蚀性良好的磷化膜。 本试验运用多种研究手段检测磷化膜质量,采用了X射线衍射(XRD)分析确定了磷化膜的组成,通过扫描电子显微镜(SEM)分析技术观察了磷化膜的微观形貌,通过测定膜厚验证了磷化液的成膜速度和工艺的效果。用硫酸铜点滴试验检测了磷化膜的致密性和耐腐蚀性,用电化学手段分析了成膜的最初时间,最终确定了常温锌系磷化液的配方和作工艺。 关键词: 磷化液,促进剂,磷化膜,常温
[Abstract] A type of Zinc phosphate solution is investigated under ordinary temperature. Effects of process parameters, including accelerators and their contents etc. are discussed. Result show that the uniform bonderizing film with high corrosion resistance can be deposited at ambient temperature during four or five minutes. Several measurements have been used to test the quality of the bonderizing film. The contents of the bonderizing film were tested by the X-ray diffraction (XRD). The microstructures were scanned by the Scanning Electron Microscope (SEM). The thickness of the film was measured by the Thickness Testing Equipment. The capability of corrosion resistance was tested by the CuSO4 drops testing. Then the first period of the film forming was acquired by electrochemistry method. After analyzing all the date of the test the best bonderizing solution has been fixed. [Key word] bonderizing liquid, accelerator, bonderizing film, ambient temperature
目录
1. 前言 2. 磷化膜的形成机理 3.磷化膜的质量检验 4. 试验方法 5.促进剂的选择 6.磷化膜组成及形貌观察 7.磷化膜性能测定 8.结论
1. 前言 随着科学技术的发展,许多新物质、新材料在生产、生活中得到了发现与应用,但是金属—作为一种不可或缺的资源,在现代制造业和结构设计中是仍然是无法所取代的,有着其重要的地位[1]。材料的综合特性,包括强度、可加工性、可用性、成本以及重复利用性,就金属而言,要使其全部满愈地达到上述各项性能指标,已越来越困难,局限性颇多[2]。就其防腐蚀和涂饰方面,油漆涂料就担负着重要的角色。而金属预处理的目的,不外乎防止腐蚀、改善油漆附着力、改善润滑状况、以及改变电特性等。为了达到上述目的,便需要改进金属表面的特性[3]。在金属表面处理中,其预处理是最为关键的一步,涉及到相当广泛的技术领域[4]。 而磷化作为一种金属表面预处理方法,是最为广泛采用的[5,6]。磷化处理技术可以应用于各种黑色金属材料(一般不包括不锈钢和高合金钢,但现阶段己经有所涉及[7-9])、铝及其合金(包括热浸镀锌钢和电镀镀锌钢)。本文将以钢铁的磷化问题作为主要研究对象来讨论。
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