| HAO Yu-lin,SHENG Hai,LI Min.Preparation of Zirconium Conversion Film on Surface of Cold-rolled Steel Sheet and Analysis of Its Electrochemistry Property[J],47(5):208-214 |
| Preparation of Zirconium Conversion Film on Surface of Cold-rolled Steel Sheet and Analysis of Its Electrochemistry Property |
| Received:November 05, 2017 Revised:May 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.05.032 |
| KeyWord:cold rolled steel plate surface activity zirconium film corrosion resistance charge transfer resistance film weight |
| Author | Institution |
| HAO Yu-lin |
Department of Application Technology, Shougang Co. Ltd of Research Institute of Technology, Beijing , China |
| SHENG Hai |
Department of Application Technology, Shougang Co. Ltd of Research Institute of Technology, Beijing , China |
| LI Min |
Department of Application Technology, Shougang Co. Ltd of Research Institute of Technology, Beijing , China |
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| Abstract: |
| The work aims to study the effects of surface state of cold-rolled steel plate on properties of zirconium film prepared on its surface. Three kinds of cold-rolled steel sheet were used as substrates to prepare zirconium conversion films on the sheet surfaces. The surface state of substrate was studied with scanning electron microscope and in the method of electrochemical analysis. Film weight, depth distribution of Zr element, surface morphology of the zirconium conversion film was analyzed with X ray fluorescence spectrometer, glow discharge spectrometer and scanning electron microscope, respectively. Electrochemical performance of the zirconium film was analyzed. Open circuit potential of A, B and C substrate was −0.66, −0.61 and −0.55 V, respectively. Charge transfer resistance was 647.9, 798.8 and 1161 Ω•cm2, respectively. Surface activity of the three substrates decreased in turn and the surface conductivity weakened. Weight of zirconium films on the surface of A, B and C was 87.28, 65.39 and 31.48 mg/m2 in turn, and the charge transfer resistance is 863.7, 920.8, 2724 Ω•cm2, respectively. Surface activity of steel plate can significantly affect properties of the zirconium conversion film. The higher the surface activity of the steel plate is, the greater the activity in the zirconification fluid is; the more violent the zirconification reaction is, and the greater the deposited zirconium film is, the weaker the corrosion resistance is. Corrosion resistance of the steel plates is enhanced after zirconium film is deposited. |
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