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通过在园林钢护栏表面镀铝液中添加La、Ce混合稀土的方法,研究了RE含量对镀层截面形貌、厚度、表面形貌、物相组成和耐腐蚀性能的影响,并分析了RE对镀层结构与性能的影响机理。结果表明,相对于未添加RE的钢护栏镀层,富Al层的厚度有所降低,而合金层和镀层的厚度都明显上升。加入RE后,合金镀层中的白色针状相都有不同程度的细化,且都要比未添加RE的镀层要细小。外层富Al层的物相为Al和Fe Al3,内层合金层物相为Fe2Al5相,RE的加入并未对钢护栏表面镀层的物相组成产生影响。
The effect of RE content on the morphology, thickness, surface morphology, phase composition and corrosion resistance of the coating was studied by adding La and Ce mixed rare earths to the aluminum plating solution on the garden steel fence. The effects of RE Mechanism of the structure and properties of the coating. The results show that the thickness of the Al-rich layer decreases, while the thickness of the alloy layer and the coating increases significantly compared with the steel fence without RE. After adding RE, the white acicular phases in the alloy coating have different degrees of refinement, and are thinner than those without RE. The phase of the outer Al-rich layer is Al and FeAl3, and the inner alloy layer is Fe2Al5 phase. The addition of RE has no effect on the phase composition of the surface of the steel fence.