分光光度法测定锌铁合金镀层及镀液中的铁

采用分光光度法，以磺基水杨酸为显色剂、双氧水为氧化剂，锌铁合金镀层用稀盐酸溶解，控制pH值为1.5～3，在等吸收点处测定吸光度，并根据比耳定律计算镀层及镀液中的铁含量。     

EFFECT OF SURFACE ROUGHNESS ON THE ADHESION OF ELECTROLESSLY PLATED PLATINUM TO POLY(ETHYLENE TEREPHTHALATE) FILMS

Poly(ethylene terephthalate) films were treated with aqueous sodium hydroxide solutions of different concentrations for various times. The rate of weight loss increased with the addition of a swelling agent (methylene chloride) or a cationic surfactant. The surface roughness of the treated films was determined from atomic force microscopy (AFM) and pore diameter was obtained from scanning electron microscopy (SEM). In general, surface roughness was found to increase with increasing weight loss for the treated films. A maximum roughness was obtained for samples with a weight loss of approximately 15-20%, beyond which the roughness of the samples decreased. The addition of methylene chloride and surfactant resulted in an almost two-fold increase in the roughness for all treatment times investigated. The adhesion of electrolessly plated platinum film was dependent on the contact area produced by chemical treatment. Treatments producing smaller diameter pores of greater depth gave better adhesion.     

镁合金化学镀镍工艺研究

研究了镁合金化学镀镍工艺过程、操作条件,测定了镀层的厚度、显微硬度和结合力,镀层具有较好的耐蚀性.     

Quantitative characterisation of Au–Co–PTFE composite coatings by differential enthalpic analysis

Energy dispersive spectrometry (EDS) and infrared reflection absorption spectroscopy (IRRAS) have been previously used for the qualitative and quantitative analysis of PTFE in gold–PTFE composite coatings. The inclusion rate of PTFE particles in the composite coating is determined close to the surface by these two methods and particularly within a thickness of 0.5 μm by EDS. Differential scanning calorimetry (DSC) is investigated for a direct determination of the inclusion rate of PTFE, independently of the depth in the coating. The gold matrix allows us to release from metal oxidation and, associated with PTFE (chemically inert), to isolate easily the composite coating by dissolution of the metal support. Correlation is made between the DSC and EDS methods previously proposed as detection tools.     

Correlation between the plating regime of lead film deposition and electrode response after accumulation of organic compound. Microscopic study

The properties of the lead film electrode designed for adsorptive stripping voltammetric measurements of organic compounds were examined by electrochemical and microscopic techniques. The effect of Pb(II) concentration, the influence of deposition potential and time of the lead film formation on the determination of bleomycin at an in situ lead-coated glassy carbon electrode have been studied. Atomic force microscopy (AFM) was used to characterize the Pb crystallite growth on the glassy carbon surface. The morphology of the deposits was evaluated and its influence on the bleomycin responses was discussed.     

板坯连铸机结晶器国产化改造

为了提高邯钢三炼钢板坯的产量和质量,邯钢对板坯连铸机结晶器进行了国产化改造。改造的内容有结晶器铜板材质、厚度、镀层、水槽,水冷梁把合螺栓、喷淋水系统、倒锥度、角缝、水槽密封、过滤网的设计改造等。通过改造,达到了预期的目标,一次拉钢量达到了8.3万吨,结晶器经过简单调整后,铜板镀层一次拉钢量已达到12万吨,产品质量显著提高,满足了生产工艺使用要求。     

齿条表面化学镀Ni-P-SiC镀层耐磨性的研究

对齿条表面化学镀Ni-P-SiC镀层的耐磨性进行了研究.结果表明:Ni-P-SiC镀层具有弥散强化、沉淀强化和固溶强化三重强化机制,齿条表面Ni-P-SiC镀层可以大幅度提高齿条的耐磨性,并有利于纤维梳理.     

Metal coating of fiber Bragg grating and the temperature sensing character after metallization

In this study, the fiber Bragg grating (FBG) was metallized with a nickel coat using an electroless-electro plating method. Under the optimum conditions, the surface of chemical plating and electroplating coat are smooth and compact, there is not any visible defect in the cross-section. The effects of the nickel coat on the properties of the fiber sensor were studied. With this plating method, the FBG can be well protected and its sensing properties can be changed. When the temperature is changed, a thermal stress between the metal coat and the fiber will be induced because of the thermal expansion coefficients difference. The thermal stress influence on the temperature sensing properties of the metalized FBG was analyzed, and a physical-mathematical model for FBG temperature sensing was presented. Experimental results show the mathematical model is feasible to explain the mechanism of temperature sensitivity enhancement for metalized FBG.     

稀土CeCl3对耐热钢Ni2Al3/Ni复合涂层抗氧化性的影响

本文采用电镀镍、低温包埋渗铝在P92铁素体耐热钢表面制备不同稀土Ce含量的Ni-Al化合物复合涂层,并对复合涂层进行650 ℃×132 h的抗氧化实验。利用OM、SEM、EDS、XRD,分析涂层氧化前后的截面微观形貌,化学元素分布及物相变化规律。结果表明：涂层的氧化动力学曲线均符合抛物线规律。不含Ce的复合涂层平均氧化速率为0.4412×10-6 g/cm2/s,渗铝剂中加入2%CeCl3的涂层抗氧化性明显增强,平均氧化速率为0.2957×10-6 g/cm2/s,而加入过量CeCl3（4%、6%）则会在氧化过程中产生更多的孔洞,恶化了涂层的高温抗氧化性能,氧化速率相对加入2 % CeCl3的涂层有所升高。另外涂层中加入Ce元素增加了氧化膜的粘附性,对Al元素的向内扩散具有抑制作用。     

超声波化学镀的研究进展

超声波化学镀的特点、超声波在化学镀中的作用机理以及超声波对化学镀的沉积速度、镀层性能等方面的影响,总结了国内外在超声波化学镀方面的研究进展.