Hot rolled oxide skin of AH36 steel can improve the corrosion potential of steel, greatly reduce the corrosion current density, and delay the corrosion of steel matrix. Cyan oxide skin has better corrosion resistance because of its thicker and denser.
Under indoor storage conditions with the average temperature and humidity of 23.4C and 72% respectively, the cyan oxide skin of AH36 steel began to bubble a little after 119d, and the red oxide skin began to appear obvious red rust spots after 119d, and the corrosion rate accelerated after 119d.
The corrosion loss of AH36 steel with oxide skin in indoor storage condition increases with the passage of time in the early stage, and basically increases linearly after the failure of oxide skin.
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