镁合金表面化学镀镍前处理工艺的研究进展

发布时间：2018-06-19 13:08

本文选题：前处理工艺 + 化学镀镍　；参考：《表面技术》2017年09期

【摘要】：镁合金作为最轻的金属结构材料,具有密度低、比强度高、弹性模量大等优势,在航天航空、汽车工业、电子通讯等领域广泛应用,但其化学性质非常活泼,在常温下很容易发生腐蚀,严重限制了其进一步推广应用。化学镀镍具有镀层致密、环境友好等优点,可有效提高镁合金的耐蚀性和耐磨性,但与普通基体相比,镁合金属于难镀金属,化学镀镍前既要去除基体表面原有的疏松多孔的氧化膜,又要生成具有保护和催化作用的新膜层,因此前处理工艺是影响镀层质量及镁合金防腐性能提高的关键因素。以化学镀镍前处理工艺为研究内容,介绍了镁合金化学镀镍前处理工艺的国内外研究现状,从除油、酸洗、活化、浸锌法、预镀层和化学转化膜等方面进行了文献综述和分析,指出相应工艺的优缺点,并探讨了研发方向。根据前处理技术的机理和不同牌号镁合金的特点,研发工艺简单、镀层性能优良、可控性强、环境友好、通用性强的低成本工艺,将是镁合金化学镀镍前处理的研究方向和发展趋势。
[Abstract]:As the lightest metal structure material, magnesium alloy has the advantages of low density, high specific strength, high elastic modulus and so on. It is widely used in aerospace, automobile industry, electronic communication and other fields, but its chemical properties are very active. It is easy to corrode at room temperature, which seriously limits its application. Electroless nickel plating has the advantages of dense coating and friendly environment, which can effectively improve the corrosion and wear resistance of magnesium alloy. Before electroless nickel plating, it is necessary to remove the original porous oxide film on the substrate surface and to form a new film with protective and catalytic effect. Therefore, the pretreatment process is the key factor that affects the quality of the coating and the improvement of the corrosion resistance of magnesium alloy. Based on the pretreatment process of electroless nickel plating on magnesium alloys, this paper introduces the research status of electroless nickel plating on magnesium alloys at home and abroad. The literature review and analysis are carried out from the aspects of oil removal, pickling, activation, zinc dipping, precoating and chemical conversion film, etc. The advantages and disadvantages of the corresponding process are pointed out, and the research direction is discussed. According to the mechanism of pretreatment technology and the characteristics of different grades of magnesium alloys, a low-cost process with simple process, excellent coating performance, strong controllability, friendly environment and strong versatility is developed. It will be the research direction and development trend of electroless nickel plating on magnesium alloy.
【作者单位】：黑龙江工程学院材料与化学工程学院;哈尔滨中飞新技术股份有限公司;
【基金】：哈尔滨市应用技术与开发项目(2016RAXXJ043) 黑龙江工程学院大学生创新训练项目(20171180208114)~~
【分类号】：TG178

【相似文献】