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首页> 外文期刊>Journal of Iron and Steel Research International >Wear Resistance of CO_2 Corrosion Product Scale Formed at High Temperature
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Wear Resistance of CO_2 Corrosion Product Scale Formed at High Temperature

机译：高温下形成的CO_2腐蚀产物垢的耐磨性

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摘要

To investigate the correlation between structure characteristics and wear resistance of CO_2 corrosion product scales at high temperature and high pressure, an autoclave was used to prepare CO_2 corrosion product scales on N80 steel in carbon dioxide corrosion environment. The correlation between wear resistance of the scales and many other factors, such as temperature, pressure, morphology, structure, velocity of fluid medium, sand grain size, and so on, was comparatively analyzed by a self-assembled wear device, and the scale morphologies before or after being worn were observed by scanning electron microscope (SEM). And then the surface grain size and thickness of scale were measured. The results showed that the cross-section of the corrosion scale was of a double-layer structure, the outer layer of which was composed of regular crystals, whereas the inner layer was a thin scale of fine grains. The outer grain size and thickness of scale varied with temperature, and the initial wear loss was consistent with the surface grain size; at the same time, the total wear loss corresponded to the thickness of scale. Compared to wear resistance in different depths of the scale, it was found that the structure of scale was a double-layer structure in cross-section, and the wear resistance of inner layer was better than that of the outer layer; the closer the scale to the matrix, the greater was the wear resistance of scale; and the larger the size or the higher the rotary speed of solid grain in multiphase flowing medium, the more was the wear loss of scale.
机译：为了研究高温高压下CO_2腐蚀产物鳞片的结构特征与耐磨性之间的关系，采用高压釜在二氧化碳腐蚀环境下在N80钢上制备CO_2腐蚀产物鳞片。通过自组装磨损装置比较分析了秤的耐磨性与温度，压力，形态，结构，流体介质的速度，砂粒大小等许多其他因素之间的相关性。通过扫描电子显微镜（SEM）观察磨损之前或之后的形态。然后测量表面晶粒尺寸和氧化皮厚度。结果表明，腐蚀垢的横截面为双层结构，其外层由规则晶体组成，而内层为细晶粒的薄层。外部晶粒尺寸和氧化皮厚度随温度而变化，初始磨损损失与表面晶粒尺寸一致。同时，总的磨损量相当于氧化皮的厚度。与不同深度氧化皮的耐磨性相比，发现氧化皮的结构为双层结构，其内层的耐磨性好于外层。氧化皮越靠近基体，氧化皮的耐磨性越大；固体颗粒在多相流动介质中的尺寸越大或旋转速度越高，水垢的磨损损失就越大。

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