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研究了3种放置角度的低碳微合金钢在CO2腐蚀、盐雾腐蚀、海水腐蚀等3种腐蚀体系中的腐蚀行为。利用SEM、XRD对不同腐蚀环境中3种放置角度下形成的腐蚀产物膜的表面形貌、截面形貌以及物相结构进行了分析。结果表明,放置角度对低碳微合金钢在3种腐蚀体系中的腐蚀行为有显著影响,在CO2腐蚀体系中,90°放置试样腐蚀速率最大,180°放置试样腐蚀速率最小;在盐雾腐蚀体系中,0°放置试样腐蚀速率最大,180°放置试样腐蚀速率最小;在海水腐蚀体系中,0°和90°放置试样腐蚀速率相差不大,但明显大于180°放置试样的。不同放置角度的低碳微合金钢在同种腐蚀体系中产生的腐蚀产物膜的物相没有显著差别。
The corrosion behaviors of three kinds of low carbon microalloyed steels with different angles were studied in three corrosion systems, CO2 corrosion, salt spray corrosion and seawater corrosion. The surface morphology, cross-section morphology and phase structure of the corrosion products formed at three different angles of deposition in different corrosive environments were analyzed by SEM and XRD. The results show that the placement angle has a significant effect on the corrosion behavior of the low carbon microalloyed steel in the three corrosion systems. In the CO2 corrosion system, the corrosion rate is the highest at 90 ° and the corrosion rate at 180 ° is the lowest. In the corrosive corrosion system, the corrosion rate was the highest at 0 ° and the corrosion rate at 180 ° was the lowest. In the seawater corrosion system, the corrosion rates at 0 ° and 90 ° were not significantly different but significantly larger than 180 ° Kind of. There is no significant difference in the phases of the corrosion products of the low carbon microalloyed steels with different placement angles in the same corrosion system.