To explore the observation of the anticorrosive coating of the vertical vibration lifting pipe in deep sea mining under the microscope and the comparative analysis of the anticorrosive coating. The corrosion resistance of three kinds of common coatings on the market were tested. The hardness, dry time, gel time, solid content and water absorption rate of polyurea coating, polyurethane coating and epoxy iron coating were measured. The advantages and disadvantages of polyurea coating, polyurethane coating and epoxy micaceous iron coating are compared through the experimental data, and they are observed under the microscope, and analyzed quantitatively and qualitatively. The elongation at break of polyurea coating, polyurethane coating and epoxy micaceous iron coatings were 48.83%, 9.41% and 42.27% respectively. The tensile strength of polyurea coating is nearly 8 times that of epoxy micaceous iron and 2 times that of polyurethane. In time, the gel time and drying time of polyurea coating were very short, the gel time was only 9s, and the drying time was only 46s. The solid content of polyurethane coating is 66.8%. Compared with polyurea coating and epoxy micaceous iron coating, the volatile content of polyurethane coating is much higher than the other two coatings. In terms of water absorption, the maximum water absorption of epoxy micaceous iron coating is about 0.76%, that of polyurea coating is about 1.16%, and that of polyurethane coating is about 3.21%. The corrosion time of metal under polyurethane coating is faster than that of other two coatings. Compared with polyurea coating and epoxy micaceous iron coating, the volatile content of polyurethane coating is significantly higher than the other two coatings. The hardness values of polyurea coating, polyurethane coating and epoxy micaceous iron coating are all higher, while the hardness values of polyurea coating and polyurethane coating are similar, while that of epoxy micaceous iron coating is relatively lower. The anti-corrosion coating of vertical vibration riser in deep sea mining was observed by microscope and good results were obtained.

Yutao Han. Anticorrosive Coating of the Vertical Vibrating Lifting Pipe in Deep Sea Mining under the Microscope. International Journal of Engineering Technology and Construction (2020), Vol. 1, Issue 2: 37-48. https://doi.org/10.38007/IJETC.2020.010204.

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