Microstructure and Corrosion Behavior of Aluminum Coatings Prepared by High-Efficiency Supersonic Plasma Spraying and Oxygen–Acetylene Flame Spraying

Jin, Zhehui; Liu, Ming; Zhu, Li; Wang, Haidou; Guo, Ma; Xing, Zhiguo; Kang, Jiqiang; Chen, Shuying

doi:10.1007/s11666-020-00980-4

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…When Zn corrodes to a cer extent, Al also begins to corrode. Finally, when the corrosive medium reaches the s strate, the coating can also provide cathodic protection for the substrate [38]. The corrosion mechanism of Zn-Al coatings is shown in Figure 15.…”

Section: Corrosion Mechanismmentioning

confidence: 99%

Effect of Sealing Treatment on Corrosion Resistance of Arc-Sprayed Zn and Zn85-Al15 Coatings

Liu

et al. 2023

Coatings

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This study investigated the corrosion morphology of arc-sprayed Zn and Zn85-Al15 coatings with and without sealing treatment under simulated defect conditions. The hole sealing treatment was carried out by Conventional Impregnation Sealing (CIS). The performance of two coatings was assessed by employing morphological analysis, chemical composition, and electrochemical studies. The results showed that the corrosion performance of two coatings with sealing treatments was better than that of the un-sealing coating. Through the double protection of coating and sealing treatment, the defect-free material has excellent anti-corrosion performance in the salt spray experiment. In the simulated defect environment, the Zn-Al coating has better corrosion resistance, and the corrosion products are denser and more stable near the defects, which reduces the overall corrosion rate of the coating. The electrochemical experiment results demonstrated that the Zn-Al coating exhibited a three times lower corrosion rate compared to the Zn coating in the immersion experiment, and the corrosion rate did not change with the thickness of the coating. The average adhesion values of the two different methods (chilled iron and alumina) were similar (~8 MPa), but after the salt spray test, the adhesion strength increased. The corrosion mechanisms of Zn coating and Zn-Al coating are analyzed and compared. In general, it was indicated that the Zn85/Al15 coating prepared by sealing treatment has better corrosion resistance than the matrix steel. This study can provide some reference for corrosion behavior in defect environments.

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Section: Corrosion Mechanismmentioning

confidence: 99%

Effect of Sealing Treatment on Corrosion Resistance of Arc-Sprayed Zn and Zn85-Al15 Coatings

Liu

et al. 2023

Coatings

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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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Corrosive Wear Mechanism of Supersonic Atmospheric Plasma Spray Coating of Hydraulic Supports in Industrial Environment

Zhang,

Ma,

Bao

2024

J. of Materi Eng and Perform

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Microstructure and Corrosion Behavior of Aluminum Coatings Prepared by High-Efficiency Supersonic Plasma Spraying and Oxygen–Acetylene Flame Spraying

Cited by 9 publications

References 29 publications

Effect of Sealing Treatment on Corrosion Resistance of Arc-Sprayed Zn and Zn85-Al15 Coatings

Effect of Sealing Treatment on Corrosion Resistance of Arc-Sprayed Zn and Zn85-Al15 Coatings

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

Corrosive Wear Mechanism of Supersonic Atmospheric Plasma Spray Coating of Hydraulic Supports in Industrial Environment

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