Hot-rolled scale-covered steel plates exhibit a certain degree of corrosion resistance during storage

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Two typical hot-rolled scale-covered steel plates were used to create on-site samples in a steel plant warehouse. The corrosion progression of these samples was monitored through continuous photography, while the temperature and humidity levels inside the warehouse were also recorded. The weight gain method was employed to assess the extent of corrosion on the steel plates, in order to study the corrosion behavior and patterns of hot-rolled steel plates with scale under indoor storage conditions. The results show that the hot-rolled oxide scale on AH36 steel can raise the corrosion potential of the steel and significantly reduce the corrosion current density; in particular, the bluish-black oxide scale, due to its thickness and density, exhibits better corrosion resistance. Under indoor storage conditions with an average temperature of 23.4 °C and humidity of 72%, slight bubbling appeared on the blue oxide scale of AH36 steel after 119 days, while obvious red rust spots appeared on the red oxide scale after 119 days; after 119 days, the corroded surfaces