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| Thickness Optimization Study on 30CrMnSiACadmium Plated Layer |
| Received:January 22, 2017 Revised:March 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.03.016 |
| KeyWord:cadmium plating detail fatigue rating cutoff fatigue property neutral salt spray test thickness optimization |
| Author | Institution |
| WANG Xiao-long |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, Special Vehicle Research Institute of China, Jingmen , China |
| SUN Zuo-dong |
Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control, Special Vehicle Research Institute of China, Jingmen , China |
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| Abstract: |
| Objective To optimize the thickness of the 30CrMnSiA cadmium plating by comprehensive consideration of the corrosion resistance and fatigue properties based on the Selection principle and thickness series for metallic and chemical coatings of GJB594A. Methods Influences of the thickness of cadmium plating on the fatigue property and the corrosion resistance were studied by five thickness series fatigue tests to calculate the DFRcutoff value and neutral salt spray test of 30CrMnSiA steel. Finally, the plated thickness after optimization was put forward by comprehensive consideration of the corrosion resistance and fatigue property. Result The fatigue property declined by 15% when the plating thickness was controlled in 5 ~ 25 μm, and declined by 20% when the thickness was more than 25 μm. In neutral salt fog environment, the plating thickness controlled in 12 ~ 25 μm could meet the design requirement for general steel structure corrosion protection. If the thickness exceeds 25μm, increasing the plating thickness its influences on the improvement of corrosion resistance was not obvious. Conclusion Cadmium plating decreases the fatigue property of materials. The corrosion resistance was proportional to the plating thickness in the neutral salt-frog environment. According to the environment characteristics of naval aircraft, it is recommended to adopt the upper limit value of 12 ~ 18μm for thickness of the 30CrMnSiA steel cadmium plating. |
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