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利用自主设计的腐蚀实验槽模拟实海潮差,并借助恒电位仅、电化学工作站对Q235B低碳钢在潮差区不同位置以及全浸区的腐蚀过程进行原位监测.结果表明,试样处在潮差区的不同位置时的腐蚀规律不同,低碳钢在中潮区和低潮区的腐蚀速率高于最高潮区及全浸区的腐蚀速率;在一个潮差涨落周期内,低碳钢开路电位的变化与表面经历的干、湿状态及所发生的阴、阳极反应有关;在长期潮差腐蚀进程中,低碳钢开路电位的变化规律与锈层的厚、薄状态有关.
The corrosion experiment tank of Q235B mild steel was used to monitor the corrosion of Q235B low carbon steel in situ at different positions in the tidal range and the immersion zone by means of potentiostatic only.The results showed that The corrosion rate of low-carbon steel in the mid-tide area and the low-tide area is higher than that in the highest tide area and the all-leaching area. During a tidal fluctuation period, the corrosion rate of mild steel The change of open circuit potential is related to the dry and wet conditions and the cathodic and anodic reactions that occur on the surface. In the process of long-term tidal corrosion, the open circuit potential of mild steel changes with the thick and thin state of rust layer.