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Corrosion of LR DH36 marine steel plate in ocean

In order to ensure the stable navigation of the ship, it is necessary to inject seawater into the oil tank for protection. The alternating action of oil and water causes serious corrosion of the LR DH36 marine steel plate; and during the use of the oil tank, due to certain impurities in the oil, the steel plate will be damaged. A certain amount of corrosion, the corrosion phenomenon is more serious on the oil-gas interface, and a similar phenomenon exists in the oil pipe. Therefore, paint protection requirements are put forward for oil storage and transportation facilities that were not protected by paint in the early stage.

During the paint protection process of the LR DH36 marine steel plate, the phenomenon that the oil-resistant anti-corrosion paint could not be painted, or fell off after brushing, seriously affected the paint protection work of the LR DH36 marine steel plate, so that the paint could not reach the Corrosion protection requirements for LR DH36 marine steel plates. In order to solve this problem, the mechanism of oil absorption and oil leakage of LR DH36 marine steel plate was studied, and the coating protection of LR DH36 marine steel plate was discussed, and the development idea of oily coating primer was proposed.

Diesel oil can be sucked into LR DH36 marine steel plate, and can seep out, the premise is that the surface of LR DH36 marine steel plate has been corroded. When the corrosion layer is completely removed by grinding, the phenomenon of oil absorption and oil leakage no longer exists. By observing the corrosion morphology of the LR DH36 marine steel plate samples exposed to the sea for 4 and 8 years, the oil absorption and oil seepage process and its main characteristics of the LR DH36 marine steel plate can be better explained. The rust layer attached to the corrosion pit of LR DH36 marine steel plate after corrosion, and the deep corrosion channel are the internal basis of the oil absorption and oil seepage mechanism of LR DH36 marine steel plate.