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在厦门海区,A_3钢板置于121目尼龙网袋内浸挂于海中,无大型附着生物,腐蚀率随温度上升而上升,说明在厌氧环境建立前,水温是影响腐蚀率的主要因素。在不同生物的生长季节全浸挂放A_3和10CrPV钢板,夏季主要附着藤壶,腐蚀率最低;秋季主要是苔藓虫,冬季和春季主要是螺赢蜚,这三个季节钢板的腐蚀率随温度的升高而升高。藤壶显著降低腐蚀率是因它的底座附着在钢板上,减少了腐蚀面积;苔藓虫和螺蠃蜚此种效果不明显。在藤壶旺季浸挂四批钢样,分别在3、6、9和12个月后回收,结果半年后腐蚀率就基本稳定,A_3为0.017而10CrPV为0.062mm/Yr。因此,利用生物附着条件,在较短时间内取得稳定腐蚀率是可能的,在一年里,试板平均蚀坑深度大约为同期腐蚀厚度的5倍。
In Xiamen sea area, A_3 steel plate was immersed in the sea with 121 mesh nylon net bag, and no large attached organisms. The corrosion rate increased with the increase of temperature, indicating that water temperature was the main factor affecting the corrosion rate before anaerobic environment was established. In the different biological growth seasons, the A_3 and 10CrPV steel plates were fully immersed and the barnacles were mainly attached in summer with the lowest corrosion rate. In autumn, bryozoans were mainly bryozoans, and winters in winter and spring. The corrosion rates of these three seasons varied with temperature Rise and rise. Barnacles significantly reduce the corrosion rate is due to its base attached to the steel, reducing the erosion area; bryozoans and snail Fei this effect is not obvious. Four batches of steel samples were immersed in the season of barnacles and were recovered after 3, 6, 9 and 12 months, respectively. The results showed that the corrosion rate was basically stable after six months, with A_3 of 0.017 and 10CrPV of 0.062 mm / Yr. Therefore, it is possible to obtain a stable rate of corrosion in a relatively short period of time by using biological attachment conditions. In a year, the average pit depth of the test plate is about 5 times of that of the same period.