Investigation of fracture behavior of annealed electroless Ni-P coating on pipeline steel using acoustic emission methodology
Author | Wang, Chuhong |
Author | Farhat, Zoheir |
Author | Jarjoura, George |
Author | Hassan, Mohammad K. |
Author | Abdullah, Aboubakr M. |
Author | Fayyad, Eman M. |
Available date | 2020-10-13T10:54:02Z |
Publication Date | 2017 |
Publication Name | Surface and Coatings Technology |
Resource | Scopus |
ISSN | 2578972 |
Abstract | Electroless Ni-P coatings have been a popular option for a variety of applications because of their autocatalytic nature and excellent resistance to wear and corrosion. These properties of Ni-P coating suggest an additional potential application as a pipeline coating. The objective of this study, is to determine the suitability of using as-deposited and annealed electroless Ni-P coating in the oil industry by investigating the toughness and dent resistance of the coating. In this study, high phosphorus content electroless Ni-P coating was deposited on API X100 pipeline steel, which was then annealed at 400, 600, and 800 °C. Structural characterization using XRD indicates that as-deposited Ni-P coating is semi-amorphous, while annealed coatings are crystalline mixture of nickel and nickel phosphide phases. Three points bending tests and Hertzian-type indentations were conducted on specimens. Acoustic emission was used to monitor crack initiation. The annealed coatings are found to have a higher hardness and Young's modulus compared to the as-deposited coatings. However, the toughness of the as-deposited coating is higher. It is also found that the indentation behavior of electroless Ni-P coating is significantly influenced by microstructure and hardness variations. |
Sponsor | This publication was made possible by NPRP grant #NPRP8-1212-2-499 from the Qatar National Research Fund (a member of Qatar Foundation). The findings achieved herein are solely the responsibility of the authors. |
Language | en |
Publisher | Elsevier B.V. |
Subject | Acoustic emission Annealing Ni-P coating Bend tests Electroless Ni-P coating Indentation |
Type | Article |
Pagination | 336-342 |
Volume Number | 326 |
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