Abstract The erosion-enhanced corrosion behavior of electroless Ni–P coating was investigated by single particle impingement coupled with in-situ electrochemical measurements. The transient anodic dissolution of Ni–P coating induced by the single particle impingement is enhanced with the rising impact velocity, followed by a rapid repassivation that obeys a bi-exponential decaying law. The coating demonstrates a good erosion-corrosion resistance due to its strong capability of repassivation that is scarcely affected by the changing hydrodynamics under the test conditions. The erosion-enhanced corrosion rate of Ni–P coating in flowing slurry is well predicted based on the repassivation kinetic parameters determined from single particle impingement.

中文翻译：

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单粒子冲击对化学镀镍磷涂层侵蚀增强腐蚀的洞察

摘要 通过单粒子撞击结合原位电化学测量研究了化学镀 Ni-P 涂层的侵蚀增强腐蚀行为。由单粒子撞击引起的 Ni-P 涂层的瞬态阳极溶解随着冲击速度的增加而增强，然后是服从双指数衰减规律的快速再钝化。该涂层具有很强的再钝化能力，在试验条件下几乎不受流体力学变化的影响，因此具有良好的抗侵蚀腐蚀性能。基于单粒子撞击确定的再钝化动力学参数，可以很好地预测流动浆料中 Ni-P 涂层的侵蚀增强腐蚀速率。