The passivation capability and chloride-induced corrosion behavior of 2304 duplex stainless steel exposed to alkali-activated slag (AAS) extract solution and mortar were investigated. Ordinary Portland cement (OPC) samples were also prepared for comparison purpose. Compared with OPC extract solution and mortar, much lower passivation capability was evident for steel in both AAS extract solution and mortar. Furthermore, although the steel surface was partially covered with precipitates in AAS extract solution and more compact interfacial microstructure was highlighted for AAS mortar when exposure to chlorides, the corrosion resistance of 2304 duplex stainless steel in AAS extract solution and mortar was significantly lower than that in OPC ones, which is primarily due to the formation of unstable and less protective passive film.

研究了2304双相不锈钢暴露于碱活化矿渣（AAS）提取液和砂浆中的钝化能力和氯化物腐蚀行为。还准备了普通波特兰水泥（OPC）样品用于比较。与OPC萃取液和砂浆相比，AAS萃取液和砂浆中钢的钝化能力明显降低。此外，尽管钢表面部分被AAS萃取液中的沉淀物所覆盖，并且暴露于氯化物下使AAS砂浆突出了更致密的界面微观结构，但是2304双相不锈钢在AAS萃取液和砂浆中的耐蚀性明显低于AAS砂浆。 OPC薄膜，这主要是由于形成了不稳定且保护性较差的被动薄膜。