Page 56 - 《橡塑技术与装备》2026年4期

橡塑技术与装备
HINA R&P TECHNOLOGY AND EQUIPMENT

A 结构单元、芳香醚键、对位取代苯环等）、功能性添 析技术路径。
加剂（如邻苯二甲酸酯类增塑剂、碳酸钙、硫酸钡）
及固化剂类型（如酸酐类）的红外特征，是复杂体系 参考文献 ：
或争议样品的可靠仲裁手段。 [1] 中华人民共和国住房和城乡建设部 . 给水涂塑复合钢管 ： CJ/T
120-2016 [S]. 北京 ：中国标准出版社，2016.
（3）针对实际样品中常见的 “ 聚酯 - 环氧树脂 ” [2] 国家市场监督管理总局 . 流体输送用钢塑复合管及管件 ： GB/
混合体系，ATR 法易因聚酯组分表层富集而高估其含 T 28897—2021 [S]. 北京 ：中国标准出版社，2021.
量，需结合 KBr 压片法进行综合判定。 [3] 冯计民 . 红外光谱在微量物证分析中的应用 [M]. 北京 : 化学
工业出版社，2010:116-117.
（4）本文提出的 “ATR 初筛 + KBr 复核 ” 两级鉴
[4] 李东阳，翟星月，方清，等 . 红外光谱分析技术在涂料检测中
别流程，兼顾效率与准确性，可有效应对市售产品中 的应用 [J]. 中国石油和化工标准与质量，2024,44(14):168-
材质混杂、配方复杂等挑战，为内涂复合钢管的质量 171+174.
[5] 王正熙 . 高分子材料剖析实用手册 [M]. 北京 : 化学工业出版社，
监管与失效溯源提供了标准化、可推广的红外光谱分
2015:247-248.

Construction and application research of FTIR analysis method for
internal epoxy resin coated plastic lined steel pipe materials

1,2
1,2
1,2
1,2
1,2,
Yu Qiaoling , Xu Xiaoyan Liang Wanxing , You Haiyun , Liu Zhijian , Wang Wanjuan 1,2
(1. Guangzhou Quality Testing & Inspection Institute, Guangzhou 511447, Guangdong, China;
2. Guangzhou NQI-Quality and Safety Technology Co-innovation Center, Guangzhou 511447, Guangdong ,
China)
Abstract: The service performance of internally coated epoxy resin composite steel pipes critically
depends on the material and quality of their plastic coating layer. In response to the challenges posed by
infrared spectroscopy identification difficulties arising from filler interference, poor surface conditions, or
component migration in practical testing, this paper systematically compares the applicability of Attenuated
Total Reflection (ATR) and potassium bromide (KBr) pellet-pressing methods in the analysis of plastic coating
layers. The results indicate that the ATR method is simple to operate and suitable for rapid initial screening
of samples with clean surfaces and minimal filler interference. Conversely, the KBr pellet pressing method
effectively eliminates surface selectivity effect, clearly presenting the characteristic absorption peaks of the
bulk resin and additives (such as phthalate plasticizers, calcium carbonate, barium sulfate, etc.), making it
particularly suitable for arbitration analysis of complex formulations or poor-quality ATR spectra. Based on this,
this paper establishes a standardized infrared identification process of "ATR initial screening - KBr verification",
and verifies the reliability of this process in identifying bisphenol A epoxy resin, polyester-epoxy hybrid systems,
and other aspects through typical samples. The research findings provide practical and efficient analytical
technical support for quality control, failure analysis, and market supervision of internally coated composite
steel pipes.
Key words: internally coated epoxy resin composite steel pipe; plastic coating layer; Fourier Transform
infrared spectroscopy (FTIR); Attenuated Total Reflection (ATR) method; KBr pellet method; material
identification; bisphenol A epoxy resin; polyester-epoxy hybrid system
(R-03)

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