Development and experimental verification of innovative corrosion protection epoxy coatings for steel

Balachandra, Anagi M.; Nassar, Roz‐Ud‐Din; Soroushian, Parviz

doi:10.1108/acmm-04-2023-2793

Cited by 6 publications

(1 citation statement)

References 57 publications

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“…However, the utilization of organic coatings presents a more intricate yet highly effective approach owing to their exceptional physical barrier properties and stable chemical characteristics (Galtiere Corrêa Rêgo et al , 2023; Lin et al , 2019; Tianyu Zhang et al , 2023; Xia et al , 2019). Epoxy coatings are widely used as anticorrosion coatings due to their exceptional mechanical properties, wear and chemical resistance and strong substrate adhesion (Balachandra et al , 2023; Jin et al , 2015; Madhusudhana et al , 2020). However, prolonged exposure to harsh atmospheric environments can cause erosion-induced flaking failure of the coating (Hou et al , 2017).…”

Section: Introductionmentioning

confidence: 99%

Correlation between the initial aging of epoxy coatings and the typical marine atmospheric environmental factors

Song,

Qin,

Zhou

et al. 2023

ACMM

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Purpose The anticorrosion coatings used in marine and atmospheric environment are subjected to many environmental factors. And the aging failure has been puzzling researchers. The purpose of this study is to find the correlation between the initial aging of epoxy coatings and the typical marine atmospheric environmental factors. Design/methodology/approach The epoxy coatings were subjected to a one-year exposure in three typical marine atmospheres. Meanwhile, principal component analysis, linear regression and Spearman and gray correlation analysis were applied to quantify the environmental characteristics and establish correlations with the coating aging. Findings The results indicate that the coating will undergo macroscopic fading and chalking upon exposure to the marine atmosphere, while microscopic examination reveals holes, cracks and partial peeling. The adhesion performance and electrochemical properties of the coating deteriorated with prolonged exposure, coating aging mainly occurs with the generation of O-H bonds and the breakage of molecular chains such as C-N and C-O-C. The coating was most deeply aged after exposure to the Xisha, followed by Zhoushan and finally Qingdao. Environmental factors affect the photooxidative aging and hydrolytic degradation processes of coatings and thus coating aging. To further demonstrate the correlation between environmental factors and coating aging, principal component analysis was used. The correlation model between environmental factors and coating aging was subsequently obtained. The correlation model between the rate of coating adhesion loss (E) and the comprehensive evaluation parameter of environmental factors (Z) is expressed as E = 0.142 + 0.028Z. Meanwhile, the Spearman correlation analysis and gray correlation method were used to investigate the impact of each environmental factor on coating aging. Solar irradiation, relative humidity and wetting time have the highest correlation with coating aging, which are all above 0.8 and have the greatest influence on coating aging; wind speed and temperature have the smallest correlation with coating aging, which are about 0.6 and have the least influence on coating aging. Originality/value This paper establishes a correlation between typical marine environmental factors and coating aging performance, which is crucial for predicting the service life of other coatings in diverse environments.

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