Prediction for Corrosion Aging of Polyethylene in Marine Atmospheric Environment of Qingdao

doi:10.11902/1005.4537.2021.318

Journal of Chinese Society for Corrosion and protection

2022, Vol. 42

Issue (6): 1070-1074 DOI: 10.11902/1005.4537.2021.318

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Prediction for Corrosion Aging of Polyethylene in Marine Atmospheric Environment of Qingdao

DING Kangkang, LIU Shaotong(

), GUO Weimin, MIAO Yichun, ZHANG Penghui, CHENG Wenhua, HOU Jian

State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China

Cite this article:

DING Kangkang, LIU Shaotong, GUO Weimin, MIAO Yichun, ZHANG Penghui, CHENG Wenhua, HOU Jian. Prediction for Corrosion Aging of Polyethylene in Marine Atmospheric Environment of Qingdao. Journal of Chinese Society for Corrosion and protection, 2022, 42(6): 1070-1074.

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Abstract

In order to solve the difficulty related to the prediction for the aging behavior of composites in natural environment with the complexity of environmental factors, polyethylene was chosen as composite matrix, and subjected to natural exposure test in the marine atmospheric environment of Qingdao area for 3, 6, 9, 12, 15, 18 and 24 months. Thereafter, based on the evolution of tensile and bending mechanical properties of the exposed polyethylene, by taking the consideration of the comprehensive influence of environmental factors into consideration, the natural weathering model with the radiation quantity as independent variable and the multi-factor superposition model with aging time as independent variable were established respectively. The results show that the tensile mechanical properties and bending mechanical properties of polyethylene both decreased with aging time and total solar irradiation in the marine atmospheric environment of Qingdao area. After exposure for 24 months, damages with micro-cracks occurred on the surface. The prediction error of natural weathering model for tensile and bending mechanical properties of polyethylene was less than 11.20%, while that of multi-factor superposition model was less than 3.07%. Therefore, the multi-factor superposition model had a better prediction precision.

Key words: marine atmosphere polyethylene corrosion aging mechanical properties prediction model

Received: 08 November 2021

ZTFLH:

TG172.3

About author: LIU Shaotong, E-mail: liu_shaotong@126.com

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	Kangkang DING
	Shaotong LIU
	Weimin GUO
	Yichun MIAO
	Penghui ZHANG
	Wenhua CHENG
	Jian HOU

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https://www.jcscp.org/EN/10.11902/1005.4537.2021.318 OR https://www.jcscp.org/EN/Y2022/V42/I6/1070

Fig.1 Atmospheric temperature (a), relative humid (b) and solar radiation (c) data of Qingdao test station during the test period

Fig.2 Changes of mechanical properties of polyethylene with aging time (a) and solar radiation (b)

Fig.3 Aging micro-morphology of polyethylene exposed for 24 months

Fig.4 Natural weathering model of bending (a) and tensile (b) mechanical properties

Fig.5 Multi-factor superposition model of bending (a) and tensile (b) mechanical properties

Table 1 Prediction accuracy of natural weathering model and multi-factor superposition model for polyethylene

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