Abstract: Electrochemical methods were employed to monitor the passivation behavior of ordinary steel reinforcement (OS) and low-alloy steel reinforcement (LS) in seawater sea-sand concrete (SSC). The X-ray photoelectron spectroscopy (XPS) was utilized to analyze the phase composition, structure, and thickness of the passivation film, along with the development of a prediction model for passivation film thickness. Experimental results reveal that the passivation film on OS primarily consisted of a dual-layer structure composed of Fe oxides/hydroxides, while the passivation film on LS featured a triple-layer structure with the addition of Cr oxides/hydroxides alongside Fe oxides/hydroxides. Nonetheless, the thickness of the passivation film between the two types of steel bars is relatively equal.
潘杜, 牛荻涛, 罗大明. 海水海砂混凝土中低合金钢筋钝化膜结构及厚度预测模型[J]. 材料导报, 2025, 39(6): 23120173-8.
PAN Du, NIU Ditao, LUO Daming. Study on the Structure and Thickness Prediction Model of Passivation Film for Low-alloy Steel Reinforcement in Seawater Sea-sand Concrete. Materials Reports, 2025, 39(6): 23120173-8.
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2025, Vol. 39 
