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基于重力分离ＳＨＳ法制备了陶瓷内衬复合钢管，分析了内衬陶瓷层的组织结构及添加剂ＳｉＯ２和ＣｒＯ３对复合钢管耐蚀性的影响。研究发现，内衬陶瓷层主要由构成枝晶的α－Ａｌ２Ｏ３基体相和分布于其间的ＦｅＯ·Ａｌ２Ｏ３尖晶石相所组成，ＳｉＯ２主要以石英相结构存在于枝晶晶界中。在Ｆｅ２Ｏ３＋Ａｌ＋ＳｉＯ２体系中，陶瓷层的腐蚀主要为晶间腐蚀，并在ＳｉＯ２添加量为４％ｗｔ时，复合钢管的腐蚀失重率出现极大值（约为１．８６２２ｇ／·ｍ２·ｈ－１）；在Ｆｅ２Ｏ３＋Ａｌ＋ＣｒＯ３体系中，陶瓷层的腐蚀主要为缝隙腐蚀，复合钢管的腐蚀失重率随ＣｒＯ３添加量增加而增多。
Based on the gravity separation SHS method, a ceramic-lined composite steel tube was prepared. The microstructure of the lined ceramic layer and the effect of additives SiO2 and CrO3 on the corrosion resistance of the composite steel tube were analyzed. It is found that the inner ceramic layer consists mainly of the α-Al 2 O 3 phase and the FeO · Al 2 O 3 spinel phase. The SiO2 layer mainly exists in the dendritic grain boundaries. In the Fe2O3 + Al + SiO2 system, the corrosion of the ceramic layer is mainly intergranular corrosion, and the corrosion loss rate of the composite steel pipe shows the maximum (about 1.8622 g / m2 · h-1) when the SiO2 content is 4% wt. In the Fe2O3 + Al + CrO3 system, the corrosion of the ceramic layer was mainly crevice corrosion. The corrosion loss rate of the composite steel pipe increased with the addition of CrO3.