Sn-SiC纳米颗粒复合镀层的制备及性能  

Preparation of Electrodeposited Tin/Nano-SiC Composite Coatings and Evaluation of Their Corrosion Resistance

作　　者：初红涛[1,2] 赵悦[1] 苏立强[1] 安茂忠[1] 

机构地区：[1]哈尔滨工业大学化工学院,黑龙江哈尔滨150090 [2]齐齐哈尔大学化学与化学工程学院,黑龙江齐齐哈尔161006

出　　处：《材料保护》2012年第7期41-43,75,共3页Materials Protection

基　　金：国家自然科学基金(50774025);齐齐哈尔市工业攻关项目(GYGG2010-06-1);齐齐哈尔大学青年教师科研启动支持计划项目(2010k-M17)

摘　　要：为了改善锡镀层的性能,在磺酸盐体系镀锡液中加入纳米SiC颗粒电镀Sn-SiC纳米复合层,采用正交试验考察了甲磺酸浓度、镀液温度、甲基磺酸亚锡浓度和电流密度对复合镀层光亮度的影响,并分析了优化工艺的镀液和镀层性能。结果表明:正交试验研究的4因素中,电流密度对镀层光亮度的影响较大,其次是温度,影响最小的是甲磺酸浓度;优化工艺为:2.0 g/L纳米SiC,0.3 g/L阿拉伯胶,3.0 mL/L光亮剂,2.0 g/L对苯二酚,21.6 g/L甲基磺酸亚锡,60.5 g/L甲磺酸,电流密度2.0 A/dm2,镀液温度20℃,时间10 min;优化工艺的镀液分散能力、覆盖能力较好,电流效率较高,镀层平整、光亮、结晶细致、无麻点、起泡,纳米SiC微粒均匀分布于复合镀层中,镀层与基体结合强度较好,有良好的耐蚀性。For the purpose of improving the properties of electroplated Sn coating, nanoscale SiC powder was introduced into sulfonate-bath for Sn electroplating to prepare Sn/nano-SiC composite coatings. The effects of the concentration of methylsulfonic acid, temperature of plating bath, concentration of Sn2+, and current density on the brightness of as-obtained composite coatings were investigated by orthogonal tests. The electroplating condition was optimized, and the properties of the plating bath under the optimized electroplating condition as well as those of the composite coating obtained thereat were analyzed. Results show that current density has significant effect on the brightness of the composite coating, which is followed by temperature of plating bath and concentration of methylsulfonic acid. The optimized electroplating bath consists of 2.0 g/L nanoscale SiC, 0.3 g/L Arabic gum, 3.0 mL/L brightener, 2.0 g/L p-dihydroxyl benzene, 21.6 g/L stennous methylsulfonate, and 60.5 g/L methylsulfonic acid; and the optimized electroplating condition is suggested as current density 2.0 A/dm2, plating bath temperature 20 ℃, and electroplating time 10 min. Under the optimized condition, the plating bath has good dispersibility and throwing power as well, showing a high current efficiency. Resultant composite coating is smooth, bright, and fine, without pits and blistering. In one word, nanosacle SiC particulates are uniformly distributed in the composite coating which has good adhesion to substrate and good corrosion resistance as well.

关 键 词：复合镀锡层 纳米SIC 甲磺酸 正交试验 光亮度 结合强度 耐蚀性 

分 类 号：TQ153.2[化学工程—电化学工业]