郝亚莉,杨文忠,尹晓爽,刘瑛.表面活性剂对 Ni-P-Al2O3 复合镀层性能的影响[J].表面技术,2016,45(6):15-21.
HAO Ya-li,YANG Wen-zhong,YIN Xiao-shuang,LIU Ying.Effect of Surfactants on the Properties of Electroless Ni-P-Al2O3 Composite Coatings[J].Surface Technology,2016,45(6):15-21
表面活性剂对 Ni-P-Al2O3 复合镀层性能的影响
Effect of Surfactants on the Properties of Electroless Ni-P-Al2O3 Composite Coatings
投稿时间:2016-01-31  修订日期:2016-06-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.06.003
中文关键词:  化学镀  Ni-P-Al2O3复合镀层  表面活性剂  Q235 钢  电化学测试
英文关键词:electroless  Ni-P/Al2O3 composite coatings  surfactant  Q235 steel  electrochemical test
基金项目:国家水体污染控制与治理科技重大专项(2013ZX07210-001)
作者单位
郝亚莉 南京工业大学 化学与分子工程学院,南京 210009 
杨文忠 南京工业大学 化学与分子工程学院,南京 210009 
尹晓爽 南京工业大学 化学与分子工程学院,南京 210009 
刘瑛 南京工业大学 化学与分子工程学院,南京 210009 
AuthorInstitution
HAO Ya-li College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, China 
YANG Wen-zhong College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, China 
YIN Xiao-shuang College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, China 
LIU Ying College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210009, China 
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中文摘要:
      目的 改善 Ni-P-纳米 Al2O3复合镀层的均匀性,提高其耐蚀性能。 方法 采用化学镀法在 Q235钢表面制备 Ni-P 纳米 Al2O3 复合镀层,分析纳米 Al2O3添加量(0~10 g/L)对镀层形貌的影响。施镀过程中选用不同种类的表面活性剂来分散纳米 Al2O3,通过 XRD 分析镀层的相组成,采用 SEM、 EDS研究镀层形貌和成分,通过测量施镀前后纳米 Al2O3 的 Zeta 电位来研究非均一镀液的稳定性和纳米粒子的分散性能,利用电化学阻抗手段研究镀膜样品在 3.5%NaCl 水溶液中的耐蚀性能,从而分析镀液中表面活性剂的种类和用量对复合镀层的影响。 结果 随着镀液中纳米粒子添加量的增加,镀层中 Al2O3含量先增加后趋于稳定,同时镀层表面纳米 Al2O3团聚现象也随之加剧。添加一定量表面活性剂之后,镀层变得均匀,纳米粒子团聚减少,其中阳离子表面活性剂(十六烷基三甲基溴化铵)在低浓度下就能对纳米 Al2O3 分散产生显著作用,而阴离子表面活性剂(十二烷基苯磺酸钠)需在较高浓度下才能达到相似效果。 结论 当镀液中阴离子表面活性剂用量为 1.25cmc, Al2O3 添加量为 6 g/L 时,镀层最为均匀,且样品在 3.5%NaCl 水溶液中耐蚀性能最好。
英文摘要:
      Objective To improve the uniformity and corrosion resistance of Ni-P-nano Al2O3 composite coatings. Methods Ni-P-nano Al2O3 composite coatings were obtained by adding different amounts of nano Al2O3 powder (concentrations ranging from 0 g/L to 10 g/L) into the traditional Ni-P electroless bath. And the morphology of the coatings was studied. Different concentrations of anionic/cationic surfactants were added into the bath to disperse the nano particles. The microstructure of the samples was studied by X-ray diffraction (XRD). The surface morphology and composition of the samples were studied by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS). The bath stability and dispersion of nano particles were determined by change of Zeta potential of Al2O3. Corrosion resistance of all the samples was evaluated in 3.5wt% NaCl solution by electrochemical impedance spectroscopy (EIS). In that way, the effects of different types and amounts of surfactants on the properties of composite coating were studied. Results With the increasing amounts of Al2O3 in the bath, the content of Al2O3 in coating increased firstly and then became stable. Yet Al2O3 agglomerated on the surface of coatings. Surfactants would affect the dispersion of nano particles, creating a coating with less agglomerated Al2O3 on the surface. A lower amount of cationic surfactant (CTAB) would disperse the nano particles very well while a higher concentration of anionic surfactant (SDBS) was required toget similar effect. Conclusion The coating formed in the bath with 6g/L nano Al2O3 and 1.25cmc SDBS exhibited the best homogeneous morphology and corrosion resistance in 3.5% NaCl solution.
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