Investigation On Antiscale And Anticorrosion Mechanism Of Water Recycle System Based On Rotating Electromagnetic Effect

From the view of temperature rise of electric machine, the thermal dissipation can be transformed to the effective thermal energy based on the principle of rotating electric machine through electromagnetic theories. So, the environmental protective thermal equipment can be manufactured. The fluid in pipe can be magnetized by the magnetization of electromagnetic fields, which can implement the antiscale and anticorrosion of the system.Technical implement and mathematic model of rotating electromagnetic effect was introduced based on analysis to the dissipation of electric machine during its operational process. Effect of rotational speed and iron length on thermal power and magnetic field distribution were analyzed using finite element simulation. Experiment using electromagnetic equipment was carried out. The experimens indicate that the novel rotating electromagnetic heat engine not only has the merits of high efficiency, high temperature ascending grads, but also has effects of magnetization on the water medium.According to engineering practice of rotating electromagnetic effect, its antiscaling effect is better. The mechanism was investigated usingconfocal laser scanning microscope, scanning electron microscopy/energy dispersive analysis system of X-ray (SEM/EDAX) and X-ray diffraction (XRD). Antiscaling mechanism of rotating electromagnetic effect is that it changes water quality; at the same time, it influences the crystal of calcium carbonate. The scale incrustation through rotating electromagnetic effect treatment is mainly aragonite, while the scale of steam boiler is calcite chiefly.Flow experiment of 45 steel and copper used in thermal recyling system was investigated using weight loss method. The result shows that the flow corrosion rate of 45 steel decreases at the initial segment, then increases at the final segment. However, the flow corrosion rate of copper decreases, then drives to gentleduring the corrosion process. Component analysis shows that corrosion products of 45 steel and copper are their oxidates. According to two dimensional and three dimensional topographies, it can be observed that flow corrosion process of 45 steel is runaway corrosion, but flow corrosion process of copper is pitting.The corrosion characters of 45 steel and copper in rotating electromagnetic feld treated sea water were investigated using electrochemical test. From polarization curve, it can seen that anticorrosion efficient of rotating electromagnetic effect on 45 steel and copper is 16.66% and 89.14%, respectively. From SEM images, the specimen in magnetized sea water is compact compared with the specimen in 3.5% NaCl and sea water, only a few pores exist. Component analysis shows that the corrosion products of 45 steel are Fe₂O₃, Fe₃O₄ and FeCl₂·6H₂O, while the corrosion products of copper are Cu₂Oå’ŒCuCl₂ chiefly.Mass transport process of corroding electrode/solution interface was analyzed based on experiment results of electrochemical corrosion. The capacitance of electric double layer was calculated using theoretical calculation and experiment. According to topography variation of electrode surface during corrosion process, the surface model of samples during the corrosion process was built based on Gaussian filter. The topography characterizations of metal corrosion process can be described using the proposed surface model. The true superficial area of electric double layer during the corrosion process can be calculated through this model.