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Accidental damaged diamond-like carbon coating by prefabricated scratches: Experimental exploration on anticorrosion and tribological performances

Zhou, Y, Li, L, Chen, Z, Rao, L, Ren, X, Xing, X and Yang, Q (2020) Accidental damaged diamond-like carbon coating by prefabricated scratches: Experimental exploration on anticorrosion and tribological performances. Diamond and Related Materials, 111. ISSN 0925-9635

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Abstract

Accidental damage on the diamond-like carbon (DLC) coating can have a great influence on the anticorrosion and tribological performances. In this study, DLC coating was deposited by a DC unbalanced magnetron sputtering technique. The scratch tests with different damage loads of 2, 10, 20, 30, 40 and 50 N were used to imitate the different types of accidental damage. The influence of different types of surface damage states on anticorrosion performance and scratch damage structures on tribological performance were studied and compared with those of the coating without damage. Cracking or spalling of the coating promotes the corrosion failure of the coating system and pitting corrosion of the stainless steel substrate, resulting in the deterioration of the corrosion protection effectiveness. With the damage increases from fine crack to complete failure, the corrosion resistance decrease obviously and the corrosion rate increases from 1.796 × 10−9 to 2.880 × 10−8 (A/cm2). The coating with an appropriate scratch structure as the sample S2 (scratch width of 0.012 mm and the ratio of the scratch width to the contact width is 0.033) can effectively avoid the softening of the coating surface caused by graphitization and collect the wear debris particles, resulting in the excellent tribological behaviors with the lowest wear rate of 1.848 × 10−16 m3/(N·m).

Item Type: Article
Uncontrolled Keywords: 0904 Chemical Engineering, 0910 Manufacturing Engineering, 0912 Materials Engineering
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Engineering
Publisher: Elsevier
Related URLs:
Date Deposited: 03 Sep 2021 09:00
Last Modified: 04 Sep 2021 05:06
DOI or Identification number: 10.1016/j.diamond.2020.108181
URI: https://researchonline.ljmu.ac.uk/id/eprint/15410

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