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Research and development of 3PP coating steel pipes

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The industrial application of an exterior three-layer anticorrosive polypropylene coating system(3PP)on large-diameter(larger than φ600 mm)steel pipes was developed using an experimental process simulation study and the optimization of raw materials inspection,steel pipe surface pretreatments,and water cooling control on a coating application process.The coating properties meet ISO standard 21809 on buried or submerged 3PP pipelines used in the petroleum and natural gas industries.Differential scanning calorimetry and X-ray diffraction were used to analyze the crystallinities and grain sizes of polypropylene(PP)top coats with different cooling rates.Increasing the melt cooling rate reduces the crystallinity and grain size of the PP top coat and enhances its strength and toughness.

3PP steel pipeoil and gas pipelinescathodic disbondmentpolypropylene coatingsexterior anticorrosive system

FANG Wenqi、MA Yuan、HUI Linlin

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Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201999,China

2024

宝钢技术研究(英文版)
宝钢集团有限公司

宝钢技术研究(英文版)

影响因子:0.08
ISSN:1674-3458
年,卷(期):2024.18(2)
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