引用本文:张亨,康志新.ABS表面无钯金属化及电沉积Ni-SiC镀层的耐腐蚀性能[J].中国表面工程,2018,31(1):114~122
ZHANG Heng,KANG Zhi-xin.Surface Metallization of ABS Without Palladium and Corrosion Resistance of Ni-SiC Coating Deposited by Electroplating[J].China Surface Engineering,2018,31(1):114~122
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ABS表面无钯金属化及电沉积Ni-SiC镀层的耐腐蚀性能
张亨1,2, 康志新1,2
1.华南理工大学 机械与汽车工程学院, 广州 510640;2.广东省金属新材料制备与成形重点实验室, 广州 510640
摘要:
为了实现ABS塑料表面环境友好型金属化，采用分子接枝及化学喷镀银工艺替代繁琐的胶体钯活化工艺，在ABS上制备了均匀致密的镀银层。随后采用直流电沉积，制备了Ni-SiC复合镀层，以提高镀层的耐腐蚀性能。利用场发射扫描电镜、电子能谱仪、X射线光电子能谱仪等分析镀层形貌特征、分子间化学键合机理。利用电化学工作站分析复合镀层的耐腐蚀性能。结果表明：镀层与ABS基体之间形成了化学键合，平均剥离强度为8 N/cm，而传统工艺的剥离强度最大值为4.9 N/cm。制备的Ni-SiC复合镀层的最小腐蚀电流密度为0.860 μA/cm2，耐腐性能优于镀镍层。
关键词:  ABS  分子接枝  化学喷镀  Ni-SiC  耐腐蚀性能
DOI：10.11933/j.issn.1007-9289.20170713003
分类号:
基金项目:广东省金属新材料制备与成形重点实验室开放课题（GJ201605）
Surface Metallization of ABS Without Palladium and Corrosion Resistance of Ni-SiC Coating Deposited by Electroplating
ZHANG Heng1,2, KANG Zhi-xin1,2
1.School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640;2.Guangdong Key Laboratory for Advanced Metallic Materials Processing, Guangzhou 510640
Abstract:
To achieve the surface metallization of ABS plastics by an environmentally friendly method, the complex processes of colloidal palladium activation were replaced by molecular grafting and chemical spray silver processes, and an uniform silver coatings were prepared in the surface of ABS plastics. Whereafter, the Ni-SiC composite coating was prepared followed by DC electroplating in order to improve the corrosion resistance of the coatings. Microstructure and intermolecular chemical bonding mechanism of the coating were analyzed by SEM, EDS and XPS, respectively. Corrosion properties of the coatings were investigated by electrochemical workstation. The results show that the maximum adhesive strength of conventional etching-sensitizing-activating processes is merely 4.9 N/cm, while the adhesive strength in present works can reach 8 N/cm. The corrosion current density of the Ni-SiC composite coating is 0.860 μA /cm2, the corrosion resistance of Ni-SiC coatings is better than that of nickel films.
Key words:  ABS  molecular grafting  chemical spray  Ni-SiC  corrosion resistance
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