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通过极化实验和阻抗实验研究了D32海洋平台用钢在浪溅区的腐蚀规律,并利用扫描电镜和能量色散谱仪分析了各钢样的腐蚀产物.结果表明,腐蚀产物的形貌成分和覆盖度的不同导致了模拟全浸区腐蚀速率稍大于钢样在海水中的腐蚀速率,模拟浪溅区腐蚀速率远大于模拟全浸区钢样腐蚀速率.钢样在青岛海水、埕岛海水的全浸区和浪溅区的Nyquist图中出现的韦伯阻抗是由于表面形成的锈层及钙镁层所致.
The corrosion behavior of steel in D32 offshore platform was studied by means of polarization experiment and impedance experiment. The corrosion products of each steel sample were analyzed by SEM and energy dispersive spectrometer. The results showed that the morphology and corrosion resistance of the corrosion- The difference of coverage leads to a slightly larger corrosion rate in simulated full immersion zone than that in steel, and the simulated corrosion rate in splash zone is much larger than that in simulated full immersion zone. The Weber impedance appearing in the Nyquist plot of the fully immersed area and the splashed area is due to the rust layer formed on the surface and the Ca-Mg layer.