Weathering steel (WS) is known to develop higher corrosion resistance than ordinary steel under atmospheric condition due to the formation of a protective, dense rust layer. This aspect, however, has not been studied so far in cement-based materials, which are characterized by high alkalinity and limited oxygen. To address the need for durable RC structure in extreme environments, it is necessary to study the behavior of WS in concrete. Here, a basic investigation was conducted to compare the short-term behavior of a newly developed WS with 1% Ni (NT) to conventional WS with 1% Cr (CT) and carbon steel (PC). One set of steel bars was exposed to solutions with varying air and pH to simulate concrete condition under chloride-containing environment. Another set was embedded in mortar under wet-dry cycle. Corrosion degree based on mass loss, coupled with half-cell potential, and corroded area was obtained. Results indicate that alkalinity or low oxygen appreciably reduces the corrosion rate of steels regardless of composition. These conditions make the corrosion behavior of NT comparable with other conventional steels. It is recommended to explore using longer time and wider cracks in future studies to achieve clearer difference between the steels.

众所周知，耐候钢（WS）在大气条件下由于形成保护性致密锈层而比普通钢具有更高的耐腐蚀性。但是，到目前为止，尚未对以高碱度和有限氧为特征的水泥基材料进行研究。为了满足在极端环境中需要持久的RC结构的需要，有必要研究WS在混凝土中的行为。在这里，进行了一项基础研究，以比较新开发的含1％Ni（NT）的WS与含1％Cr（CT）和碳钢（PC）的常规WS的短期性能。将一组钢筋暴露于具有变化的空气和pH值的溶液中，以模拟含氯环境下的混凝土状况。在湿-干循环下将另一组埋入砂浆中。基于质量损失的腐蚀程度，加上半电池电位，得到腐蚀面积。结果表明，无论成分如何，碱度或低氧都会明显降低钢的腐蚀速率。这些条件使NT的腐蚀行为可与其他常规钢媲美。建议在以后的研究中探索使用更长的时间和更大的裂纹，以使钢之间的差异更加明显。