TRẠNG THÁI ĂN MÒN BAN ĐẦU CỦA THÉP AH36 TRONG NƯỚC BIỂN Ở ĐIỀU KIỆN PHÒNG THÍ NGHIỆM CÓ TÍNH ĐẾN DÒNG CHẢY
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Tóm tắt
INITIAL CORROSION BEHAVIOR OF AH36 STEEL IN FLOWING OF SEA WATER UNDER LABORATORY CONDITIONS
The effect of velocity on initial electrochemical behavior and corrosion state of AH36 shipbuilding structural steel was studied in the laboratory. Open-circuit potential, electrochemical impedance spectroscopy and linear polarization were used to evaluate the electrochemical properies. Corrosion rate was determined by mass loss method. The results showed that the surface electrochemical behavior changed rapidly in a short time and was stable up to 7 days before achieving a stable value. There was a difference between samples in flowing compared with stationary samples. Velocity of sea water flow did not only accelerate the higher steel corrosion rate in the same conditions, but also cause uneven surface corrosion due to non-uniform self-dissection of the corrosion product.
Từ khóa
AH36 structural steel, seawater, initial corrosion behavior, velocity, thép kết cấu AH36, nước biển, trạng thái ăn mòn ban đầu, dòng chảy
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Tài liệu tham khảo
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