| WANG Hao-ran,QIU Chang-jun,ZENG Xiao-an,ZHANG Wen,WANG Xiao-jing,LIU Yan-hong,LI Huai-lin.Effect of Temperature on Morphology and Corrosion Resistance of Pure Cr Coating[J],46(6):192-196 |
| Effect of Temperature on Morphology and Corrosion Resistance of Pure Cr Coating |
| Received:February 19, 2017 Revised:June 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.06.030 |
| KeyWord:temperature multi-arc ion plating corrosion resistance Cr coating |
| Author | Institution |
| WANG Hao-ran |
School of Mechanical Engineering, University of South China, Hengyang , China |
| QIU Chang-jun |
School of Mechanical Engineering, University of South China, Hengyang , China |
| ZENG Xiao-an |
School of Mechanical Engineering, University of South China, Hengyang , China |
| ZHANG Wen |
School of Mechanical Engineering, University of South China, Hengyang , China |
| WANG Xiao-jing |
State Power Investment Corporation Central Research Institute, Beijing , China |
| LIU Yan-hong |
State Power Investment Corporation Central Research Institute, Beijing , China |
| LI Huai-lin |
State Power Investment Corporation Central Research Institute, Beijing , China |
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| Abstract: |
| The work aims to explore the effect of temperature on corrosion resistance and surface morphology of pure Cr coating. The Cr coating was prepared on the surface of zirconium alloy by means of arc current plating process. Scanning electron microscopy (SEM) and Image J image processing software were used to analyze surface morphology of pure Cr coating, count and analyze size and number of large particles on the surface. X-ray diffractometer (XRD) was applied to analyze phase structure of the coating. The effect of temperature on film adhesion and corrosion resistance of the Cr coating was analyzed using scratch tester and CS electrochemical workstation. The number and average size of large particles on the coating surface were the maximum at 380 ℃, and the minimum at 420 ℃; the both increased gradually as the temperature rose to 450 ℃, 500 ℃. With the rise of temperature, growth mode of the Cr coating changed from preferred growth on (110) crystal plane to that on (200) crystal plane. The average crystal size firstly decreased and then increased as the temperature varied. Varying pattern of coating adhesion and corrosion re-sistance with increasing temperature was contrary to that of the large particles, which firstly increased and then decreased. The number and average size of large particles on the surface of the coating are the maximum at 420 ℃, the adhesion and corrosion re-sistance are high, the organizational structure is dense, grains are fine and surface is smooth. |
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