改性凹土基金属表面复合涂层悬浮剂的研究

Study on metal surface composite coating suspended agent prepared by modified attapulgite clay

利用复合活性剂对凹土粉末进行改性处理,通过SEM和XRD分析粉末的组分变化,对改性凹土制备的金属表面复合涂层悬浮剂流变性能以及抗氧化性能进行研究。实验结果表明,72 h后悬浮剂的悬浮率达到96%,在剪切速率作用下,悬浮剂具有较好的剪切粘度和应力,能够形成网络状结构,保证悬浮剂稳定性。经过1 000℃×2 h热处理,悬浮剂能够在碳钢表面覆盖复合涂层,碳钢的脱碳层深度只有0.05 mm,较好的抑制碳钢高温脱碳氧化的现象。

In this paper,the compound active agent was used to modify the soil powder.The variation of the powder composition was analyzed by SEM and XRD,and the rheological properties and antioxidant properties of the metal surface composite coating suspension prepared by the modified soil were studied.The experimental results show that the suspension rate of the suspension agent reached 96%after 72 h.Under the action of the shear rate,the suspension agent had a good shear viscosity and stress,and could form a net-like structure to ensure the stability of the suspension agent.After heat treatment at1 000℃for 2 h,the suspension could cover the surface of carbon steel with a composite coating.The carbon steel had a carbon layer depth of only 0.05 mm,which was better to inhibit the phenomenon of high temperature carbon oxidation of carbon steel.