| ZHOU Ying-wei,GAO Bo.Effects of Si, Mg and RE on Microstructure and Properties of Hot Dip Galvanized Alloy Coatings[J],46(11):183-189 |
| Effects of Si, Mg and RE on Microstructure and Properties of Hot Dip Galvanized Alloy Coatings |
| Received:September 02, 2017 Revised:November 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.11.025 |
| KeyWord:hot dipping alloying element coating microstructure corrosion resistance corrosion resistance mechanism |
| Author | Institution |
| ZHOU Ying-wei |
School of Metallurgy, Northeastern University, Shenyang , China |
| GAO Bo |
School of Metallurgy, Northeastern University, Shenyang , China |
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| Abstract: |
| Hot dipping technology is an effective method for long-term corrosion of steel materials, it has been widely used as it can significantly improve corrosion resistance of steel materials and extend service life of the materials. Recently, with the continuous improvement of technological level, traditional hot-dip coating has failed to meet the demands of market diversification, and study on multicomponent alloy coating has become a hotspot in the field of hot dipping. With the constant deepening of study, it was found that overall performance of hot-dip coating could be greatly improved by adding alloy elements in the hot dipping process could significantly improve the comprehensive performance of the hot-dip coating. However, it was worthy to discuss how addition of alloying elements affected coating microstructure and performance. The effects of the addition of several alloying elements including silicon, magnesium and rare earth on the microstructure, corrosion resistance and anticorrosion mechanism of hot-dip coating were introduced in detail. Influence rule of additive amount of alloying elements on properties of hot dip coating was further analyzed by enumerating research examples at home and abroad. Finally, influence rule and mechanism of various alloying elements and additive amount on the microstructure and properties of hot-dip coating were further studied, formation and growth rules of intermetallic compound layer in alloy coating after addition of alloy elements were discussed thoroughly, and developing new high-performance hot-dip coating and corresponding hot-dipping process was proposed to be the main research direction of hot dipping technology in the future. |
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