| CHEN Lin.Preparation and Performance of Black Phosphating Coating of Zn-Ca System at Medium Temperature[J],37(5):52-54,63 |
| Preparation and Performance of Black Phosphating Coating of Zn-Ca System at Medium Temperature |
| Received:June 15, 2008 Revised:October 10, 2008 |
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:Black phosphatizing Zn-Ca system Medium temperature Phosphating film Chemical analysis Blacking process |
| Author | Institution |
| CHEN Lin |
Dept. of Materials and Chemical Engineering, Sichuan University of Science and Engineering, Zigong , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Black phosphatizing formula and technological condition of Zn-Ca system at medium temperature were developed to obtain phosphatizing coating with good look and properties. SEM, X-ray fluorescence ( XRF) were used to analyse the morphology and component of the film. The thickness, adhesive strength, friction times and corrosion resistance of the film were tested. The experimental results demonstrate the black phosphating coating with excellent protection can be obtained dipping in Bi( N03 )3 solution before phosphatizing, when Cu ( N03 ) 2 and Na2M004 are used as the blackening component and accelerated oxidation component. With the content of Cao increasing the morphology of the crystals can be changed. When Cao is 30 g/L, the diameter of the crystal obviously descends and the content of Zn and Ca of the film increases. The wear-resistance and the corrosion resistance are improved. |
| Close |