Evaluation of the stress corrosion crack growth behaviour of high-strength marine steel based on model of crack tip mechano-electrochemical effect

Li, Yong; Hu, Tao; Li, Qian; Wu, Yang; Wang, Ling; You, Yang; Wang, Biyun

doi:10.1016/j.jmst.2023.12.007

Cited by 5 publications

(1 citation statement)

References 67 publications

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“…With the rapid advancement of the ocean economy, an increasing amount of marine engineering equipment is being produced and utilized for ocean measurement, observation, and forecasting. Meanwhile, in seawater, certain essential components of marine equipment, such as manipulators and environmental monitoring systems, encounter a range of challenges, such as scratch and corrosion problems [1][2][3][4][5]. Surface and coating technology are effective methods to extend the service life of those crucial components and realize their reliable operation without altering the fundamental characteristics of the substrate materials [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Long-Term Corrosion Resistance of 316L Stainless Steel by Multilayer Amorphous Carbon Coatings

Li,

Guo

et al. 2024

Materials

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Diamond-like carbon (DLC) coatings are effective in protecting the key components of marine equipment and can greatly improve their short-term performance (1.5~4.5 h). However, the lack of investigation into their long-term (more than 200 h) performance cannot meet the service life requirements of marine equipment. Here, three multilayered DLC coatings, namely Ti/DLC, TiCx/DLC, and Ti-TiCx/DLC, were prepared, and their long-term corrosion resistance was investigated. Results showed that the corrosion current density of all DLC coatings was reduced by 1–2 orders of magnitude compared with bare 316L stainless steel (316Lss). Moreover, under long-term (63 days) immersion in a 3.5 wt.% NaCl solution, all DLC coatings could provide excellent long-term corrosion protection for 316Lss, and Ti-TiCx/DLC depicted the best corrosion resistance; the polarization resistances remained at ~3.0 × 107 Ω·cm2 after immersion for 63 days, with more interfaces to hinder the penetration of the corrosive media. Meanwhile, during neutral salt spray (3000 h), the corrosion resistance of Ti/DLC and TiCx/DLC coatings showed a certain degree of improvement because the insoluble corrosion products at the defects blocked the subsequent corrosion. This study can provide a route to designing amorphous carbon protective coatings for long-term marine applications in different environments.

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