Accelerated Hydrothermal Aging and Degradation Mechanism of PE100 Butt-Fusion Welded Joint

High-density polyethylene (HDPE) pipelines are extensively utilized in energy transportation in the ocean. However, long-term exposure to water can alter the performance of HDPE, potentially leading to pipeline accidents. This study focuses on simulating the aging characteristics of PE100 polyethyle...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2024-11, Vol.17 (22), p.5505
Main Authors: Chen, Yingchun, Li, Yanfeng, Yang, Jie, Xi, Yan
Format: Article
Language:English
Subjects:
Accidents
Butt joints
Experiments
Fourier transforms
High density polyethylenes
Impact strength
Infrared analysis
Infrared spectroscopy
Mechanical properties
Mechanical tests
Molecular chains
Oxidation
Performance characteristics
Pipes
Polyethylene
Radiation
Raw materials
Scanning electron microscopy
Temperature
Tensile strength
Welded joints
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High-density polyethylene (HDPE) pipelines are extensively utilized in energy transportation in the ocean. However, long-term exposure to water can alter the performance of HDPE, potentially leading to pipeline accidents. This study focuses on simulating the aging characteristics of PE100 polyethylene pipeline butt-fusion welded joints (B-FWJs) in water using hydrothermal accelerated aging experiments at various temperature gradients. The performance of the B-FWJ after hydrothermal aging was characterized using scanning electron microscopy (SEM), oxidation induction time (OIT), attenuated total reflectance Fourier transform infrared (ATR FT-IR) spectroscopy, and mechanical testing. Furthermore, this study analyzed the performance characteristics and changes in the micro-molecular chains of an HDPE B-FWJ pipeline following hydrothermal aging. An investigation was conducted into the effects of hydrothermal aging temperature and duration on the physical and chemical characteristics of HDPE B-FWJ, and the aging mechanism under hydrothermal aging conditions was explored. The results indicate that increasing hydrothermal aging temperature leads to a more significant decrease in the mechanical properties of the B-FWJ. These findings contribute to understanding the aging behavior of PE100 pipelines in the joint section and offer insights to mitigate the risks associated with the aging of and damage to B-FWJ pipelines in the ocean.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17225505