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钛板无氰电刷镀银的初步研究 总被引:1,自引:0,他引:1
在电刷镀银技术中,通常采用含氰络合物电刷镀银,其优点主要是镀液稳定性好,易于控制,镀层质量好;但镀液有毒,对人体危害较大,且对环境造成污染,为此,人们致力于无氰电刷镀银问题的研究.通过试制研究,钛板表面经特殊处理、电刷镀前预处理及底层镀镍等方法,开发了无氰电刷镀银工艺.1实验方法1.1实验材料 TA2钛板(GB/T3621-94)1.2电刷镀银试验 试样尺寸: 50mm X 50mm X 2.0mm 电刷镀用阳极:镍板 70mm X 70mm4.0mm(表面用涤纶包套) 控制电源:型号 DS— 60(输入电压… 相似文献
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亚硫酸盐无氰脉冲镀银工艺 总被引:3,自引:0,他引:3
用亚硫酸盐为主络合剂的无氰镀液,以不锈钢为基体进行了光亮镀银的工艺研究,不锈钢表面经过预处理,电镀后可获得结合良好的镀层,采用脉冲电镀,同直流电镀比较,镀银层耐蚀性,耐磨性较好,镀层更加光亮细致。 相似文献
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研究了电流密度、镀液温度及镀液pH对水溶液法在碳钢表面无氰镀铜时镀层质量、镀层外观及电流效率的影响。结果表明:在电流密度5A/dm2、镀液温度70℃、镀液pH=11条件下,碳钢表面铜镀层平整光亮,电流效率高,并且镀层与碳钢基体结合力良好。 相似文献
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采用无氰电刷镀银溶液,通过对钛基体进行喷砂、机械打磨、化学刻蚀等表面处理,电镀前再经过表面活化,可有效地提高钛基体与镀银层之间的结合力。 相似文献
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键合银丝具有生产成本低,导电导热性好,但其抗氧化、硫化性低,不能完全替代键合金丝,特别是在高密度的集成电路封装工业中,因此镀金银基键合丝应运而生,通过在银丝表面覆盖镀金层,使其抗氧化能力提高,成球性好,可靠性高。主要介绍无氰镀金工艺和镀金银基键合丝的发展。 相似文献
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In electroplating lines,many conductor rolls are installed in electroplating bath.Typical electroplatings are tin plating(ETL) and zinc plating(EGL),and from required product qualities,a vertical cell for the former and a horizontal cell for the latter is often used.Generally,chrome plating or WC cermet thermal spray coating is applied to stainless steel conductor roll in ETL for prolonging service life by improvement of wear resistance and corrosion resistance.On the other hand,Hastelloy type alloy subs... 相似文献
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文章介绍了镀镍丝与电镀镍的生产工艺,详细分析了影响电镀镍工艺的诸因素,提出了电镀镍生产过程中故障排除的方法与举措,可供电镀业同类型生产厂家的工程技术人员参考和借鉴。 相似文献
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Urinary N-acetyl-beta-glucosaminidase as an indicator of renal dysfunction in electroplating workers
OBJECTIVES: To investigate chromium-induced renal dysfunction in electroplating workers. METHODS: A cross-sectional study was used to evaluate four biochemical markers of renal function. A total of 178 workers were divided into 3 comparable groups consisting of 34 hard-chrome plating workers, 98 nickel-chrome electroplating workers. and 46 aluminum anode-oxidation workers, who represented the reference group. Ambient and biological monitoring of urinary chromium were performed to measure exposure concentrations. RESULTS: Overall, urinary chromium concentrations were highest among hard-chrome plating workers (geometric mean 2.44 microg/g creatinine), followed by nickel-chrome electroplating workers (0.31 microg/g creatinine) and aluminum workers (0.09 microg/g creatinine). Airborne chromium concentrations were also highest in the hard-chrome plating area (geometric mean 4.20 microg/m3), followed by the nickel-chrome electroplating area (0.58 microg/m3) and the aluminum area (0.43 microg/m3). A positive correlation was found between urinary chromium and airborne concentrations (r=0.54, P < 0.01). Urinary concentrations of N-acetyl-beta-D-glucosaminidase (NAG) were also highest among hard-chrome plating workers (geometric mean 4.9 IU/g creatinine), followed by nickel-chrome workers (3.4 IU/g creatinine) and aluminum workers (2.9 IU/g creatinine). The prevalence of "elevated" NAG (>7 IU/g creatinine) was significantly highest among hard-chrome plating workers (23.5%), then among nickel-chrome workers (7.1%) and aluminum workers (8.7%). Differences in beta2-microglobulin, total protein, and microalbumin were not significant. CONCLUSION: The author's evidence indicates that NAG is an early indicator of renal dysfunction in hard-chrome plating workers. 相似文献
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甲基磺酸(MSA)高速电镀锡是一种高效环保的镀锡工艺。该工艺技术成熟,已经广泛应用于美国等发达国家。中国近些年来在甲基磺酸(MSA)高速电镀锡领域进行了大量研究,梅钢、首钢等相继建立了甲基磺酸(MSA)高速电镀锡生产线。介绍了国内外甲基磺酸(MSA)高速电镀锡生产线的基本情况以及相关企业应用情况,提出离子交换膜电解法溶锡技术以及电磁辐射加热软熔技术具有良好的应用前景。 相似文献
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Development of Continuous Coating and Plating Strip Steel 总被引:3,自引:0,他引:3
Coated and plated steel sheets,which charac-terized by high corrosion resistance,good shapingexcellent painting and decorating,are widely used inmany industries,such as building,automobile,light industry,and household appliances etc.Coatedand plated steel sheets contributes to improvingquality of products,extending their service life,sav-ing steels,reducing production costs and diminish-ing environmental pollution.With increasing of var-ious industrial products and improving of the quali-ty,re… 相似文献
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为优化碳纤维表面电镀镍的工艺条件,采用电镀法在碳纤维表面沉积一层纯镍层,通过正交试验法研究了不同工艺参数下碳纤维增重率的变化,探讨电流密度、电镀时间和镀液温度对镀层表面形貌和厚度的影响;并用冷热循环法测试不同厚度镀层与碳纤维之间的结合力.结果表明,采用电流密度0.56 A/dm2,电镀时间6 min,温度50℃时制备的镍镀层表面光洁、均匀致密,是较为理想的镀层. 相似文献