Abstract In order to reveal the corrosion of a ship hull in flowing seawater, which is difficult to study under experimental conditions, a numerical method was adopted. Firstly, the numerical model of seawater flow field around the hull was established and computed, and the hydraulic characteristics of the flow field such as velocity, pressure, and oxygen concentration distribution were got. The distribution of oxygen has a great influence on corrosion. Generally speaking, where the oxygen concentration is higher, the corrosion rate is higher. The results show that the oxygen concentration is higher at the rear of the hull bottom surface. Next, a corrosion model was founded based on the above calculation. Through the calculation of the corrosion model, the mass transfer coefficient and corrosion rate distribution on the hull surface were obtained and the final conclusion was got flow accelerated corrosion (FAC) mechanism was revealed. The conclusion is as follows: Comparatively speaking, the corrosion rate of the middle and rear part of the bottom and the middle part of the sideboard is higher. Generally speaking, the corrosion rate increases with the increase of flow rate.

中文翻译：

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流动加速腐蚀机理下船舶腐蚀速率预测

摘要 为了揭示在实验条件下难以研究的船体在流动海水中的腐蚀情况，采用数值方法。首先，建立并计算了船体周围海水流场的数值模型，得到了流场的速度、压力、氧浓度分布等水力特性。氧气的分布对腐蚀有很大的影响。一般来说，氧浓度越高，腐蚀速率越高。结果表明，船体底面后部的氧气浓度较高。接下来，基于上述计算建立腐蚀模型。通过腐蚀模型的计算，得到了船体表面的传质系数和腐蚀速率分布，最终得出了揭示流动加速腐蚀（FAC）机理的结论。结论如下： 相对而言，底板中后部和餐边柜中部的腐蚀率较高。一般来说，腐蚀速率随着流量的增加而增加。