The study of steel corrosion in steel-reinforced cementitious system has attracted much attention because this system is used in key buildings and infrastructure, and, thus, its deterioration represents a significant hazard. In many constructions, the top cement surface is coated with a stucco system. In this study, we present experimental results on the corrosion behavior of a rapid-set stucco composite consisting of calcium sulfoaluminate cement (CSA). The rapid-set stucco is a new product on the market and was designed to improve the practicality of stucco use, which typically requires three coatings. Our test results indicate that the structure is not influenced by the fine aggregate (FA) content but is affected by the water-to-cement (w/c) ratio. The w/c ratio affects the apparent diffusivity (D_a) of chloride ions penetrating the structure. The pH results indicate that the passivation layer is not formed, leaving a doubt that the CSA stucco should be in use, especially for non-galvanized steel reinforced system. To reduce the negative effect of absence of passivation layer, uniform mixing and casting mixture having good workability is needed which can prolong its serviceability up to 3 times. The use of galvanized steel is also essential which can be increase its service life for at least 5 to 10 times. This is because zinc layer from galvanization process also greatly decreases the corrosion rate by 475% less than that of steel layer itself.

钢筋水泥体系中钢腐蚀的研究引起了广泛关注，因为该体系用于关键建筑和基础设施，因此其劣化代表着重大危害。在许多建筑中，顶部水泥表面涂有灰泥系统。在这项研究中，我们展示了由硫铝酸钙水泥 (CSA) 组成的速凝灰泥复合材料的腐蚀行为的实验结果。速凝灰泥是市场上的一种新产品，旨在提高灰泥使用的实用性，这通常需要三层涂层。我们的测试结果表明结构不受细骨料 (FA) 含量的影响，但受水灰比 (w/c) 的影响。w/c 比影响表观扩散率 ( D _a) 的氯离子穿透结构。pH 结果表明没有形成钝化层，因此怀疑是否应该使用 CSA 灰泥，特别是对于非镀锌钢增强系统。为了减少没有钝化层的负面影响，需要均匀混合和具有良好可加工性的浇注混合物，可将其使用寿命延长至 3 倍。镀锌钢的使用也是必不可少的，它可以将其使用寿命延长至少 5 到 10 倍。这是因为镀锌过程中的锌层也大大降低了腐蚀速度，比钢层本身的腐蚀速度降低了 475%。