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Ni-Cr alloy electrodepositing technology on Fe substrate and coating performance

  • Xu Li-jian  (许利剑)Email author
  • Gong Zhu-qing  (龚竹青)
  • Tang Jian-xin  (汤建新)
  • He Quan-guo  (贺全国)
  • He Nong-yue  (何农跃)
  • Du Jing-jing  (杜晶晶)
Article

Abstract

The Ni-Cr alloy electrodepositing technology on iron substrate in the chlorid-sulfate solution and the impacts of main processing parameters on coating composition were studied. The optimal Ni-Cr alloy electrodepositing conditions are that the cathode current density is 16 A/dm2, the plating solution temperature is 30 °C and the pH value is 2.5. The bright, compact coating gained under the optimal conditions has good cohesion and 24.1% Cr content. The results show that the coating is composed of crystalline, the average grain size is 82 nm and the higher the Cr content of coating, the larger the rigidity, and the higher the corrosion resistance. The rigidity of coating reaches 78.6(HR30T) and the passivation area broadens to 1.4 V when the Cr content of coating is 24.1%.

Key words

electrodeposition plating Ni-Cr alloy corrosion resistance 

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Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Xu Li-jian  (许利剑)
    • 1
    Email author
  • Gong Zhu-qing  (龚竹青)
    • 1
  • Tang Jian-xin  (汤建新)
    • 2
  • He Quan-guo  (贺全国)
    • 2
  • He Nong-yue  (何农跃)
    • 2
  • Du Jing-jing  (杜晶晶)
    • 2
  1. 1.School of Metallurgical Science and EngineeringCentral South UniversityChangshaChina
  2. 2.Green Packaging and Biological Nanotechnology LaboratoryHunan University of TechnologyZhuzhouChina

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