侯云波,王胜民,赵晓军,张俊.机械沉积Cd镀层的制备及性能研究[J].表面技术,2019,48(9):218-223.
HOU Yun-bo,WANG Sheng-min,ZHAO Xiao-jun,ZHANG Jun.Preparation and Properties of Mechanically Deposited Cd Coatings[J].Surface Technology,2019,48(9):218-223
机械沉积Cd镀层的制备及性能研究
Preparation and Properties of Mechanically Deposited Cd Coatings
投稿时间:2018-11-25  修订日期:2019-09-20
DOI:10.16490/j.cnki.issn.1001-3660.2019.09.024
中文关键词:  机械沉积  镉镀层  活化剂  粉末  耐腐蚀性能  海洋气候
英文关键词:mechanical deposited  cadmium plating  activator  corrosion resistance  ocean climate
基金项目:
作者单位
侯云波 昆明理工大学 材料科学与工程学院,昆明 650093 
王胜民 昆明理工大学 材料科学与工程学院,昆明 650093 
赵晓军 昆明理工大学 材料科学与工程学院,昆明 650093 
张俊 昆明理工大学 材料科学与工程学院,昆明 650093 
AuthorInstitution
HOU Yun-bo School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 
WANG Sheng-min School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 
ZHAO Xiao-jun School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 
ZHANG Jun School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China 
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中文摘要:
      目的 制备机械沉积Cd镀层,并研究其组织、性能。方法 以分析纯超细镉粉作为镉源,采用机械沉积法并添加复配的活化剂,在Q235基体表面制备了Cd镀层。采用扫描电子显微镜(SEM)及其自带的能谱仪(EDS)分析了镀层的组织形貌和化学成分,采用X射线衍射法(XRD)分析了镀层的物相组成,采用铁试剂法测试分析了镀层的孔隙率,采用划格划线法测试分析了镀层的结合强度,采用电化学极化法、中性盐雾加速腐蚀试验和浸泡试验测试分析了镀层的耐蚀性能。结果 机械沉积Cd镀层是镉粉颗粒通过物理结合形成的阳极性保护镀层,镀层没有发现贯通性孔隙且和基体之间结合良好。在同为20 μm厚度的情况下,机械沉积Cd镀层的自腐蚀电位(-743 mV)相比机械沉积锌(-1307 mV)提高了500 mV左右,自腐蚀电流密度降低了约2个数量级,腐蚀倾向与腐蚀速度显著降低。机械沉积Cd镀层中性盐雾试验中,出现5%红绣的时间为600 h,相比机械镀锌出现5%红绣的时间(72 h),延长了9倍左右。结论 通过机械沉积的方法在Q235试样表面制备的镉镀层为阳极性保护镀层,镀层的耐腐蚀性能相比机械镀锌提高了9倍左右,耐腐蚀性能优异。
英文摘要:
      The work aims to prepare mechanically deposited Cd coatings and study their microstructure and properties. The pure superfine cadmium powder was used as the cadmium source to prepare Cd coating on the surface of Q235 by mechanical deposition with activator. The microstructure and chemical composition of the coating were analyzed by scanning electron microscopy (SEM) and own energy dispersive spectroscopy (EDS). The phase composition of the coating was analyzed by X-ray diffraction (XRD). The porosity of the coating was analyzed by the iron reagent method. The bonding strength of the coating was analyzed by the cross-hatch method. The corrosion resistance of the coating was analyzed by electrochemical polarization method, neutral salt spray accelerated corrosion test and immersion test. The mechanically deposited Cd coating was an anodic protective coating formed by cadmium powder particles through physical bonding. No penetrating pores were found in the coating layer and the bonding between the substrate and the coating was good. When the coating was 20 μm, the self-corrosion potential (-743 mV) of mechanically deposited Cd coating was about 500 mV higher than that of mechanically deposited zinc (-1307 mV), and the self-corrosion current density was reduced by about 2 orders of magnitude, which significantly reduced the corrosion tendency and corrosion rate of the coating. Under neutral salt spray conditions, the mechanically deposited Cd coatings showed 5% red embroidery for 600 h. which was about 10 times longer than the time when mechanical galvanizing showed 5% red embroidery (72 h). The cadmium coating prepared on the surface of Q235 by mechanical deposition is an anodic protective coating. The corrosion resistance of the coating is about 10 times higher than that of mechanical galvanizing. The cadmium coating has excellent corrosion resistance.
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