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| Preparation and Properties of Sherardizing Layer on Steel Fasteners Modified by Rare Earth Lanthanum |
| Received:March 31, 2017 Revised:August 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2017.08.012 |
| KeyWord:sherardizing rare earth orthogonal test fastener |
| Author | Institution |
| HUANG Yan-bin |
Academy of Armored Forces Engineering, Beijing , China |
| HUANG Jun-xiong |
Academy of Armored Forces Engineering, Beijing , China |
| WANG Qi-chao |
Academy of Armored Forces Engineering, Beijing , China |
| LU Shi-yong |
The 618 Factory Military Agent’s Room, Beijing , China |
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| Abstract: |
| Objective To improve the corrosion prevention ability of fasteners in marine environment. Methods With the help of modifying effects of rare earth on diffusion zinc layer, the orthogonal test method was used to optimize the sherardizing agent formulation and process parameters; and more excellent rare earth modified sherardizing layers were prepared. Results Parameters (mass fraction) of the rare earth modified optimization sherardizing technology were: La2 (NO3)3 content: 1% Zn powder content: 70%, CO (NH2)2 content: 2%, the content of Al2O3: 27%, heating temperature of 460 ℃, insulation time: 2 h. Compared with the diffusion zinc layer prepared by commonly used zinc impregnation agent, the modified diffusion zinc layer was more uniform, compact and smooth. Conclusion The layer thickness is improved by 107.3%, and it has a better effect on the corrosion medium. Its corrosion resistance is better. |
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