Fabrication and investigation of the scratch and indentation behaviour of new generation Ni-P-nano-NiTi composite coating for oil and gas pipelines
المؤلف | MacLean M. |
المؤلف | Farhat Z. |
المؤلف | Jarjoura G. |
المؤلف | Fayyad E. |
المؤلف | Abdullah A. |
المؤلف | Hassan M. |
تاريخ الإتاحة | 2020-04-09T12:27:27Z |
تاريخ النشر | 2019 |
اسم المنشور | Wear |
المصدر | Scopus |
الرقم المعياري الدولي للكتاب | 431648 |
الملخص | Oil and gas pipelines operate under severe mechanical and chemical conditions, which could lead to catastrophic failure. Electroless nickel-phosphorous (Ni-P) coatings are an excellent candidate for protection against wear and corrosion for oil and gas pipelines. Ni-P coatings exhibit superior corrosion resistance over many commercially available coatings, as well as high hardness. However, electroless Ni-P coatings suffer from low toughness, which has limited its use in applications where high scratch and dent resistance is required. To enhance the toughness of the Ni-P coatings, nano-sized particles of superelastic NiTi alloy were incorporated within the coating. In the present work novel Ni-P-nano-NiTi composite coating has been successfully plated on API X100 pipe steel. Scratch tests under constant and increasing loads were performed to determine the effect of NiTi nano-particles on wear damages. Indentation tests were carried out to assess the dent resistance and crack modes of the coating. The addition of superelastic nano-particles into the Ni-P matrix led to toughening through transformation toughening, crack bridging, deflection, and microcracking. The composite coatings exhibited lower hardness in comparison to monolithic Ni-P coatings, but still provided considerable improvement upon the steel substrate. Optical and scanning electron examinations showed evidence of delamination, radial, and Hertzian cracking, as well as a reduction in crack length with the addition of superelastic NiTi. |
راعي المشروع | This publication was made possible by NPRP grant #NPRP8-1212-2-499 from the Qatar National Research Fund (a member of Qatar Foundation) |
اللغة | en |
الناشر | Elsevier Ltd |
الموضوع | Electroless nickel phosphorous Indentation Superelastic NiTi Toughening mechanisms Wear testing |
النوع | Article |
الصفحات | 265-276 |
رقم المجلد | 426-427 |
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