Comparative Study on Flow-Accelerated Corrosion and Erosion-Corrosion at a 90° Carbon Steel Bend.

Étude comparative de la corrosion accélérée par l'écoulement et de l'érosion-corrosion dans un coude à 90° en acier au carbone.

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ID: 105205
2020
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Abstract
Electrochemical measurements and surface analysis are performed to comparatively study flow-accelerated corrosion (FAC) and erosion-corrosion (E-C) behavior at a 90° carbon steel bend. The corrosion rates are higher under FAC conditions than those under E-C conditions. For FAC, the corrosion is more serious at the inside wall. However, corrosion is exacerbated at the outside wall under E-C conditions. No erosion scratches are observed under FAC conditions and at the inside wall under E-C conditions, while remarkable erosion scratches appear at the outside wall under E-C conditions. The dominant hydrodynamics affecting FAC and E-C are remarkably different.
Des mesures électrochimiques et des analyses de surface sont réalisées afin d'étudier de manière comparative le comportement en corrosion accélérée par l'écoulement (FAC) et en érosion-corrosion (E-C) au niveau d'un coude à 90° en acier au carbone. Les vitesses de corrosion sont plus élevées dans les conditions de FAC que dans les conditions d'E-C. Pour la FAC, la corrosion est plus sévère sur la paroi interne. En revanche, la corrosion est exacerbée sur la paroi externe dans les conditions d'E-C. Aucune strie d'érosion n'est observée dans les conditions de FAC ni sur la paroi interne dans les conditions d'E-C, tandis que des stries d'érosion remarquables apparaissent sur la paroi externe dans les conditions d'E-C. L'hydrodynamique dominante affectant la FAC et l'E-C est remarquablement différente.
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zeng2020comparativematerials Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li Zeng, Geng Chen, Hanxin Chen
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Journal Materials (Basel, Switzerland)
Year 2020
DOI
E1780
URL
Keywords
SEM hydrodynamics erosion-corrosion flow-accelerated corrosion

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