设计了模拟低合金钢局部腐蚀自催化过程的“闭塞”阳极模 拟电池，提出了影响闭塞阳极模拟电池可靠性的三个主要几何参数，探讨了闭塞阳极腔室高 度和直径对低合金钢腐蚀局部化的促进作用，确定了闭塞阳极模拟电池可模拟低合金钢腐蚀 的最佳几何尺度，利用闭塞阳极模拟电池评价了低合金钢在3.5% NaCl溶液中的局部腐蚀趋 势.测试结果与实海长期挂片结果一致，证明了模拟电池的可靠性.
A new OCC simulate cell has been designed to simul ated the autocatalytic process by the occluded corrosion cavity(OCC) on low allo y steel in 3.5% NaCl solution.The effects of geometrical factors of OCC simula ted cell have also been discussed.There are two important parameters in OCC whic h play an important role in localized corrosion process for low alloy steel, the height and diameter of occluded corrosion cavity.The corrosion rate increases with thes e two parameters.The suitable size of OCC is 3,3 for height and diameter of OCC which can simulate the corrosion tendency of five low alloy steels used as speci men in this experiment.The pitting corrosion rates of low alloy steels have been rank with the cell.The results are in agreement with the corrosion data got by long time immersion test in the sea.
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