Comparative Study of Anti-Corrosion Properties and Lifespan Prediction Model for Inorganic Zinc-Rich Coating and Thermal-Spray Zinc Coating

Ni, Weiliang; Zhu, Yanan; Di, Zhigang; Guo, Lixin; Liu, Yunqi

doi:10.3390/coatings12040505

Cited by 5 publications

(1 citation statement)

References 33 publications

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“…Organic coatings, as an effective method for corrosion protection, experience a higher aging rate than those in the Yellow Sea and the East China Sea, which leads to a high corrosion risk for long-term protection. Thermally sprayed aluminum [5,6], zinc [7,8] and aluminum-zinc alloy [6,9,10] coatings can provide long term protection for steel structures in most types of environments, which are rarely reported in the South China Sea. According to some reports, zinc has the same corrosion rate as steel in most marine environments [11,12], so many people worry that thermally sprayed coatings cannot provide enough long-term protection for steel in some harsh situations [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Degradation Behavior of Arc-Sprayed Zinc Aluminum Alloy Coatings for the Vessel Yongle in the South China Sea

Huang

Zhao

et al. 2023

Coatings

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Since thermally sprayed zinc and aluminum coatings were invented 100 years ago, they have realized extensive industrial applications for steel structure protection in a variety of fields for nearly 100 years and have been proven to be effective and reliable. However, it has seldom been reported in the ship industry in China since many workers worry about the risk of rapid corrosion, especially in harsh environments such as the South China Sea. In this paper, three kinds of arc-sprayed zinc aluminum coatings were tested to choose the best coating system for application on the research vessel Yongle by electrochemical behavior and a long-term atmospheric exposure experiment. The variation of the corrosion rate and the bonding strength was used to clarify the long-term protection performance. The results show that Zn15Al has the lowest corrosion (Rp larger than 2200 Ω·cm2) among the three kinds of coatings and has a bonding strength larger than 6.38 MPa after a 5 year test. The performance of the coatings in the South China Sea indicates that they can provide excellent protection for the hull above the waterline of the Yongle vessel in the 3 year test. It could be predicted that thermally sprayed zinc aluminum coating has vast application potential in the South China Sea due to its excellent anticorrosion performance.

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