共查询到20条相似文献,搜索用时 140 毫秒
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镀银件腐蚀变色机理及防变色工艺 总被引:10,自引:0,他引:10
就银及银合金镀层性能及其在湿热、盐雾及含工业性有害气体的大气环境中腐蚀机理作了分析,并对各种防变色工艺效果对比后,大体上认为抗变色能力的顺序为:涂复有机保护剂>镀钯镍合金>涂复无机保护剂>电泳沉积膜>电化学钝化膜>化学钝化膜。对于滑动的镀银表面宜选 用有润滑作用的保护剂,它不仅防变色,还可减少磨损。 相似文献
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有机硅改性聚甲基丙烯酸甲酯一聚苯胺复合材料的制备及其电致变色性能研究 总被引:5,自引:0,他引:5
本文采用溶液聚合法及乳液聚合法合成了可溶性聚苯胺,用光电子能谱、X-射线衍射对其本征态及掺杂态的结构进行了表征。以甲基丙烯酸甲酯-甲基丙烯酰丙基三甲氧基硅烷共聚物为基体,用溶液复合法制备了聚苯胺复合电致变色膜,并采用扫描电镜、循环伏安法等对其结构和电致变色性能进行研究。结果表明复合电致变色膜在稳定态时仅出现第二氧化峰,在外加电压作用下其颜色在绿色至蓝黑色之间可逆变化。共聚物中含有偶联剂组分可以提高电致变色膜与ITO导电玻璃基底的粘结性及改善复合电致变色薄膜的耐溶剂性能。 相似文献
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可逆型示温涂料的研制 总被引:8,自引:0,他引:8
采用醇酸漆漆漆基,变色颜料,价廉、易得的叶蜡石填料和二甲苯溶剂,制得可逆型示温少料。介绍了该涂的变色原理和制法。通过正交试验,讨论了变色颜料、漆基和填料的用量,以及涂层厚度和恒温时间对涂料变色温度的影响。 相似文献
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T系列复合三维膜防金属变色技术 总被引:3,自引:0,他引:3
根据作者关于光和氧对银变色加速作用的发现,提出了复合三维防变色膜模型,它能有效地吸收紫外光,抑制亲水性腐蚀介质的浸入和填补防变色膜中可能存在的孔隙。按这模型设计制成的T系列金属防变溶液使用方便,成本低,电性能好,不含有机溶剂,适用于装饰体和电子元器件的坊变色。文中列举了AT-2防银变色剂、CT-1防铜及仿金变色剂、UT-1防金变色剂的使用效果。该成果已经江苏省科委等单位鉴定并在几个工厂使用。 相似文献
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脉冲无氰镀银及镀层抗变色性能的研究 总被引:2,自引:0,他引:2
采用赫尔槽试验筛选出一种阴离子表面活性剂及含氮杂环化合物作为脉;中无氰镀银的添加剂,并初步确定了无氰镀银的工艺条件及脉冲条件一通过正交试验进一步化化脉冲条件及镀银添加剂含量分别为:脉宽1ms、占空比10%、平均电流密度0.6A/dm^2、阴离子表面活性剂及含氮杂环化合物含量分别为12mg/L、110mg/L测定了该镀银层的耐蚀性、抗变色性能及与基体的结合力,并用扫描电镜对其微观形貌进行了观察。结果表明,脉冲无氰镀银层的抗变色性能优于直流无氰镀银层;光亮镍打底后再脉冲无氰镀银,可获得更加光亮、结晶细致的镀银层,且抗变色性能及耐蚀性均增强. 相似文献
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The features of chemical composition and molecular structure of polymer silver containing coatings and their changes under the heating were studied. The coatings have been deposited from the gas phase formed by electron-beam dispersion of polymer and silver salt mixture. The impact of polymer matrix and silver salt nature on the parameters of surface plasmon effect occurrence, as well as on the molecular structure of the coatings has been established. 相似文献
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Silver–carbon nanocomposite coatings were deposited by plasma-enhanced chemical vapor deposition and d.c. magnetron sputtering of a silver target. Coatings with various metal concentrations were prepared by changing of acetylene and argon gas mixture ratio (C2H2/Ar), and concentrations of more than 40 at.%Ag was achieved in this study. Transmission electron microscope revealed that silver metallic grains with typically 15 nm were dispersed in amorphous carbon host matrix. Size of the grains increased with decrease of the gas mixture ratio due to secondary or triangularly formed metal grains. Tribological behavior of the coatings was investigated using reciprocating tribometer with in-situ electrical contact resistance measurement. Low and stable friction coefficient was achieved in the specimen with relatively low Ag concentration. Elemental mapping results on the ball after the friction tests reveal that tribofilm was formed on the ball when low and stable friction was achieved, and the tribofilm was mainly composed of C and Ag. It can be concluded that formation of the tribofilm is necessary for achieving low and stable friction. 相似文献