Effect of flexure on rusting of ship's steel plating
Effect of flexure on rusting of ship's steel plating
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DOI：
10.1080/17445300902990614
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发表时间：
2010-03
影响因子：
2.1
通讯作者：
R. Melchers;J. Paik
中科院分区：
文献类型：
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作者：
R. Melchers;J. Paik
从老化船舶收集的数据表明，船舶镀层的腐蚀速度可能会随着长期暴露而增加，再加上钢板弯曲。其原因尚未澄清。在此，研究的可能性，所观察到的效果是由于高应变下的钢板，可能是由高海况和装卸过程中造成的保护生锈的损失。最近，在自然海洋暴露期间，对结构钢上形成的锈的拉伸应变诱导断裂的相对短期暴露研究表明，腐蚀速率增加约10- 15%，但仅当应变接近和超过钢的弹性极限时。这对船舶管理有影响。给出的解释在文献中报道的腐蚀损失曲线，它表明，至少在定性上，它们是一致的，与早期的观察和模型的钢在海洋环境中的腐蚀。建议用实船在腐蚀和弯曲条件下的长期暴露来检验结论的有效性。
Data collected from ageing ships indicate that the rate of corrosion of ship's plating may increase with long periods of exposure when combined with plate flexure. The reasons for this have not been clarified. Herein, the possibility is investigated that the observed effect is due to the loss of protective rusts under high strains in the steel plating, as might be caused by high sea-states and during loading and unloading. Recently, relatively short-term exposure studies of the tensile strain-induced fracture of rusts formed on structural steels during natural marine exposure show an increase in corrosion rate of some 10–15%, but only when the strains are near and beyond the elastic limit of the steel. This has implications for ship management. An interpretation is given for the corrosion loss curves reported in the literature and it is shown that, qualitatively at least, they are consistent with earlier observations and models for the corrosion of steel in marine environments. It is proposed that the validity of the conclusions be tested using long-term exposures under corrosion and flexure conditions in actual ships.