Experimental and simulation studies of the effect of surface roughness on corrosion behaviour of X65 carbon steel under intermittent oil/water wetting

Understanding the Corrosion Behaviour of Steel Under Alternate Oil/Water Wetting with Different Oil Viscosities

“…12a, the oil film stability was determined by the surface tension, the viscous force between oil and water phase, the static friction force between oil and steel, gravity force and pressure. Through analysis in our previous research, 17 it was found that the surface tension was the key factor to make the oil film rupture. The MD simulation results illustrates that the low-viscosity oil under water has stronger adhesion to the steel surface, compared with medium-/high-viscosity oil.…”

“…Additionally, the underwater oil contact angle for different oil viscosities was measured by the KSV CAM 200, following the experimental procedure in the Ref. 17.…”

“…The common wetting behaviour of steel exposed to oil/water mixture is the coverage of oil film, which affects the corrosion behaviour. [13][14][15][16] To observe wetting behaviour of steel under alternate wetting, our previous research 11,17 devised an alternate wetting cell combined with electrochemical analysis. It was found that the steel surface under alternate wetting was observed to be covered by the oil film, the lifetime of which was tightly linked to the corrosion rate of steel.…”

A Self‐Powered Multiphase Flow Detection Through Triboelectric Nanogenerator‐Based Displacement Current

“…Though the feasibility of the TENG-based multiphase flow sensor to distinguish the static water and air phase has been verified by the above theoretical and experimental analysis, the sensor performance still needs to be evaluated during an alternate wetting process, which is a common and complicated phenomenon in the industrial pipeline flow. [32,45,46] Therefore, an experimental rig is designed to simulate the alternate water/air wetting phenomenon, as shown in Figure 3a. In the present rig, a plate-type transmitter is fixed on the bottom of the open channel, which is connected with a rotary TENG.…”

“…However, the wetting state is hard to reflect the complicated characteristics of multiphase flow. For example, the pipeline exposed to slug flow may be constantly wetted by the water phase due to the existence of the thin water film, [ 32 ] causing the liquid/solid TENG‐based sensor not to monitor multiphase flow parameters, such as slug frequency and water cut. Thus, there is a demand for a paradigm‐shift TENG‐based sensor to acquire comprehensive information on complex multiphase flow.…”