关于基于有机前驱体的三价铬纳米黑色膜工艺与黑化机制项目的研究ppt课件
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文章编号:1001-3849(2008)07-0039-03 三价铬镀液电镀黑铬工艺研究①刘存琨, 屠振密, 李 宁, 毕四富(哈尔滨工业大学(威海)应用化学系,山东威海 264209) 摘要:经正交试验确定了三价铬电镀黑铬的最佳镀液组成和工艺条件,并对优选的三价铬镀液及镀层进行性能测试,结果表明:镀液的分散能力约为15%;镀液的覆盖能力约为95%;还测定了几种镀液的阴极极化曲线,并进行了比较,最优镀液的阴极极化曲线的极化度最大。
电镀5min的镀层厚度约为0.5μm,镀层的主要组分为Cr、O、Co、P和Na。
关 键 词:三价铬镀液;电镀黑铬;分散能力中图分类号:TQ153.11 文献标识码:AThe Technology Research of Black Chromium Electroplatingwith Trivalent Chromium Electrolyte LIU Cun-kun,TU Z hen-mi,LI Ning,BI Si-f u(Depa rtment o f Applied Chemist ry,H a rbin Institute o f Technolog y a t W eihai,W eihai 264209,China)Abstract:The technolog y processes was fix ed based o n the sing le facto r test,and com pa rison analysis fro m the results of Hull cell test.The best composition and opera ting conditio n w ere ob-tained by o rthog o nal tests.Perfo rmance of the optim al ba th and coatings w ere tested.The re-sults sho w tha t the throwing pow er and cov ering po wer of the ba th are o f15%and95%respec-tiv ely;the la rg est pola riza tion deg ree of the cathode polariza tion curv e is o btained from the o pti-mal bath;the co mposition elements of the coa ting are Cr,O,Co,P and Na,and the thickness of the co ating with5min plating is abo ut0.5μm by X RF.Keywords:triv alent chromium pla ting bath;black chromium plating;throw ing pow er引 言电镀黑铬一般都用含铬酐镀液,但六价铬镀液毒性大,污染环境、效率低。
•144•DOI: 10.19289/j.1004-227x.2020.03.005 高耐蚀性三价铬黑铬镀层制备工艺陈康*,郭崇武(广州超邦化工有限公司,广东广州510460)摘要:介绍了一种高耐蚀性三价铬黑铬镀层电镀工艺,包括在金属基体(如钢铁和锌合金)上制备预镀铜层、中间镀铜层、光亮镀铜层、镀镍层、高耐蚀性三价铬白铬镀层和三价铬黑铬镀层。
这种三价铬复合镀层可耐中性盐雾试验96 h(无白锈),比普通三价铬黑铬镀层长一倍。
关键词:三价铬电镀;白铬镀层;黑铬镀层;复合;耐蚀性中图分类号:TQ153.17; TQ153.2 文献标志码:A 文章编号:1004 – 227X (2020) 03 – 0144 – 02Process for preparation of highly corrosion-resistant black chromium coatings in trivalent chromium electrolyte // CHEN Kang*, GUO ChongwuAbstract: A process for preparing highly corrosion-resistant black chromium coatings on metal substrate such as iron, steels, and zinc alloys in a trivalent chromium electrolyte, was introduced, including the copper pre-electroplating, intermediate copper electroplating, bright copper electroplating, nickel electroplating, highly corrosion-resistant white trivalent chromium electroplating, and black trivalent chromium electroplating. The trivalent chromium composite coating can endure 96 hours of neutral salt spray test without the formation of white corrosion product on its surface, which is twice as long as that of a common trivalent black chromium coating.Keywords: trivalent chromium electroplating; white chromium coating; black chromium coating; combination; corrosion resistanceFirst-author’s address: Guangzhou Ultra Union Chemicals Ltd., Guangzhou 510460, China三价铬电镀黑铬用于取代六价铬电镀黑铬已经获得了广泛的应用[1],并且取得了良好的环境效益和社会效益。