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<p>The slurry erosion behaviour of polychloroprene rubber (CR) was investigated using a controlled slurry-jet erosion test (SJET) rig under varying impact conditions. The effects of stand-off distance, slurry velocity, impact angle, particle size, and sand concentration were systematically evaluated. Associated particle-delivery characteristics, including mass flux and impact frequency, were also analysed to clarify the governing wear mechanisms in CR. Erosion exhibited a dual-peak angular response, with a maximum at 15–20°associated with shear-driven cutting and ploughing, and a secondary peak at 90° associated with deformation-related wear mechanisms. An optimum stand-off distance of 20&#xa0;mm was identified due to the balance between particle energy retention and particle-delivery conditions. Increasing slurry velocity, particle size, and sand concentration consistently increased the erosion rate. Larger particles caused disproportionately higher erosion despite lower impact frequency because of their greater momentum and localized deformation severity. Surface analyses confirmed a transition from shear-dominated wear at low impact angles to indentation, microcracking, and deformation-related damage at normal incidence. Comparison with the Neilson–Gilchrist erosion model showed that the model captures the general contributions of cutting and deformation wear but does not fully account for viscoelastic recovery, strain-rate sensitivity, and time-dependent material response. The results improve understanding of slurry erosion mechanisms in CR and provide guidance for the design and selection of elastomeric components operating in slurry-handling environments.</p> Graphical abstract <p></p>

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Slurry erosion of polychloroprene rubber: mechanisms, impact dynamics and comparison with wear models

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月10日

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  • Wichain Chailad,
  • Liu Yang

摘要

The slurry erosion behaviour of polychloroprene rubber (CR) was investigated using a controlled slurry-jet erosion test (SJET) rig under varying impact conditions. The effects of stand-off distance, slurry velocity, impact angle, particle size, and sand concentration were systematically evaluated. Associated particle-delivery characteristics, including mass flux and impact frequency, were also analysed to clarify the governing wear mechanisms in CR. Erosion exhibited a dual-peak angular response, with a maximum at 15–20°associated with shear-driven cutting and ploughing, and a secondary peak at 90° associated with deformation-related wear mechanisms. An optimum stand-off distance of 20 mm was identified due to the balance between particle energy retention and particle-delivery conditions. Increasing slurry velocity, particle size, and sand concentration consistently increased the erosion rate. Larger particles caused disproportionately higher erosion despite lower impact frequency because of their greater momentum and localized deformation severity. Surface analyses confirmed a transition from shear-dominated wear at low impact angles to indentation, microcracking, and deformation-related damage at normal incidence. Comparison with the Neilson–Gilchrist erosion model showed that the model captures the general contributions of cutting and deformation wear but does not fully account for viscoelastic recovery, strain-rate sensitivity, and time-dependent material response. The results improve understanding of slurry erosion mechanisms in CR and provide guidance for the design and selection of elastomeric components operating in slurry-handling environments.

Graphical abstract