发动机气缸无槽电镀工艺研究

研究了发动机气缸整体无槽电镀工艺。设计了气缸网状多孔性镀铬工艺规范参数、工艺方案和单片机控制系统,实现了镀层厚度和阳极刻蚀的单片机智能化控制,保证了无槽电镀铬层质量。试验结果表明：网状多孔性镀铬层具有良好的结合强度和较高的抗磨粒磨损、粘着磨损及腐蚀磨损的能力,其耐磨性是45淬火钢的3.56倍,抗粘着、冲击负荷能力远远高于低温镀铁层。气缸网状多孔性镀铬可提高气缸使用寿命3.5倍以上,具有较高的社会效益和经济效益。     

电镀废水污染区土壤重金属含量的测定及污染状况评价

运用原子吸收光谱法,测定了某地电镀废水污染区重金属污染土壤样品中Cd、Pb、Cu、Zn4种元素的含量,RSD小于1%,加标回收率在92.78%~103.2%之间,表明测定结果可靠。依据测定数据、国家土壤环境质量二级标准、内梅罗指数法及潜在生态危害指数法,对电镀废水污染区土壤重金属污染状况进行评价。按二级标准评价结果为中度以上污染;以内梅罗综合污染指数法进行评价,土壤受到重度污染;用潜在生态危害指数法对污染生态风险进行评估,总潜在生态风险程度为重度。因此应对该区污染土壤进行治理。     

鱼腥藻对重金属污水中Zn2+的吸附研究

[目的]研究鱼腥藻对电镀废水中Zn~(2+)的吸附效率。[方法]以鱼腥藻为材料,利用原子吸收分光光度法,测定鱼腥藻在5 min内对电镀废水中Zn~(2+)的吸附去除效果。[结果]鱼腥藻浓度为629.2 mg/L时,电镀废水中Zn~(2+)浓度由3.296 5降至0.748 5 mg/L,单位吸附量达4.859 5 mg/g,对Zn~(2+)的吸附效率最高,达77.3%。[结论]该研究为重金属污水的治理提供了理论依据。     

网购商品也有七天后悔期

江苏省泰兴市张桥镇秦某来电：今年双十一时．在一家电商网站买了一副电镀哑铃。到货几天后我打开包装，发现电镀哑铃是掉漆的．很多螺丝也有松动。请问：我能要求退货吗？答：新消费者权益保护法于今年3f115日生效．按照该法规定．网购消费者也享有七天“后悔期”．凡是对收到的货物不满意的．可在七天内无理由退货。店主声称的“货一出门概不退还”．目的是为了排除或者限制消费者权利，减轻或免除经营者责任，加重消费者的责任，这些条款都是不公平、不合理的“霸王条款”，一律无效。     

Surface characteristics of electroless nickel plated electromagnetic shielding wood veneer

Wood is a kind of porous natural material with very poor electro-conductivity, and it has almost no function of electromagnetic shielding. The method of electroless nickel plating was used to produce wooden material with electrical and effective electromagnetic shielding properties. Ni-P alloy layer was obtained on wood surface. The surface feature of plated wood veneer was observed by SEM and the surface composition and microstructure of the layer under different conditions were investigated by EDS and XRD respectively. Meanwhile, the relevant surface resistivity and electromagnetic shielding effectiveness were measured. Correlations of the phosphorous content in the layer to the structure of Ni-P alloy, electro-conductivity and electromagnetic shielding of plated veneers were discussed. SEM photos showed that the surface of electroless nickel plated veneers were covered with Ni-P alloy layer entirely, which made wood veneers more like metal. At the same time, the results showed that with the decreasing of the phosphorous content in the layer, the microstructure of Ni-P alloy layer transformed to be microcrystalline and electro-conductivity and electromagnetic shielding effectiveness were improved. When the phosphorous content was less than 2.37wt pct in the layer, the microstructure of Ni-P alloy layer was microcrystalline structure and its sur- face resistivity and electromagnetic shielding effectiveness were nearly 0.5Ω/□ and 55-60dB respectively.     

木材表面的功能性改良

论述了木材表面功能性改良的目的，介绍了木材染色，表面强化，无电解电渡处理，化学表面修饰，等离子体聚合和表面活性化的功能性改良方法，概述了改良木材的性能和用途。     

电镀鲜花饰品制作方法

盛开的鲜花经过电镀处理,就能成为永不凋谢的电镀鲜花饰品.它可以保持鲜花原有的形态和花瓣纹理,并可以永远保留鲜花最娇艳时的形态,是众多女性的最佳佩饰之一.