模拟海水对Q235钢腐蚀性能的影响分析

Simulated Seawater on the Corrosion Performance of Q235 Steel

以Q235碳素钢为研究对象,借助旋转式挂片腐蚀试验仪,考察转速、温度、酸碱度等因素对其在模拟海水中腐蚀性能的作用。结果表明,腐蚀速度随温度的变化呈现两个阶段:第一阶段,当温度小于45℃时,腐蚀速度随温度的增大而不断升高;第二阶段,在温度大于45℃时,曲线斜率最大,腐蚀速度达到最大值;腐蚀速度随转速的变化呈现两个阶段:第一阶段,当转速小于60 r/min时,腐蚀速度基本保持不变,维持恒定;第二阶段,当转速大于60 r/min时,曲线斜率增大,腐蚀速度急剧升高,腐蚀速度随转速的增大而不断升高,并出现60 r/min的临界值;腐蚀速度随酸碱度的增大而不断降低。所得结论对Q235钢在海洋环境中的腐蚀和防护具有一定的参考价值。

Taking Q235 carbon steel as the research object,the effect of factors such as speed,temperature,acidity and alkalinity on its corrosion performance in simulated seawater was investigated using a rotary hanging plate corrosion tester.The results show that the corrosion rate varies with temperature in two stages.In the first stage,when temperature is lower than 45℃,the corrosion rate continuously increases with the increase of temperature.In the second stage,when temperature exceeds 45℃,the slope of the curve is maximum and the corrosion rate reaches its maximum value.The corrosion rate shows two stages as the speed changes.In the first stage,when the speed is less than 60 r/min,the corrosion rate remains basically unchanged and remains constant;In the second stage,when the speed is greater than 60 r/min,the slope of the curve increases,and the corrosion rate sharply increases.The corrosion rate continuously increases with the increase of speed,and a critical value of 60 r/min appears;The corrosion rate decreases continuously with the increase of acidity and alkalinity.The conclusions obtained have certain reference value for the corrosion and protection of Q235 steel in marine environments.