关键词:

碳钢, 磨损腐蚀, 数值模拟, 协同效应

Abstract: On the basis of single-phase flowing model, two-phase liquid/solid flowing theory was introduced to study numerically the flow induced corrosion of carbon steel in 3.5% NaCl+5% sand. It was found that the mechanics parameters of particle-phase including impact angle, impact frequency, impact velocity strongly influenced the hydrodynamic and mass transfer parameters (surface shear stress, mass transfer coefficient), which sharply increased erosion-corrosion rate of carbon steel within the limits of 0—18m•s^-1 flow velocity. The results further showed that the numerical corrosion rates were almost equal to the measured rates. Thus it was verified that under flowing condition the electrochemical corrosion action still played an important role in corrosion synergism of carbon steel. With further increasing flowing velocity, wear rate was still small, but it could not be ignored.

Key words:

碳钢, 磨损腐蚀, 数值模拟, 协同效应