Nie Hailiang, Ma Weifeng, Deng Kang, Zhao Guangqiang, Mao Ying, Ren Junjie, Dang Wei, Wang Ke, Cao Jun, Yao Tian, Liang Xiaobin
Institute of Safety Assessment and Integrity, State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Center of CNPC, Xi'an 710077, China.
No. 10 Oil Production Plant of PCOC, Jiayuguan 745000, Gansu, China.
ACS Omega. 2023 Feb 10;8(7):6402-6410. doi: 10.1021/acsomega.2c06648. eCollection 2023 Feb 21.
Compressor outlets are subject to high temperatures and vibrations; when pipelines are subject to such conditions, degradation of the anticorrosive layer on the pipeline is likely. Fusion-bonded epoxy (FBE) powder coating is the most common type of anticorrosion coatings on compressor outlet pipelines. It is necessary to study the reliability of anticorrosive layers in compressor outlet pipelines. In this paper, a service reliability test method for the corrosion-resistant coatings of compressor outlet pipelines of natural gas stations is proposed. Testing involving the simultaneous exposure of the pipeline to high temperatures and vibrations is conducted to evaluate, on a compressed timescale, the applicability and service reliability of FBE coatings. The failure mechanism of FBE coatings exposed to high temperatures and vibrations is analyzed. It is found that, due to the influence of initial imperfections in the coatings, FBE anticorrosion coatings typically do not meet the standard requirements for use in compressor outlet pipelines. After simultaneous exposure to high temperatures and vibrations, the impact resistance, abrasion resistance, and bending resistance of the coatings are found not to meet the requirements for their intended applications. It is therefore suggested that FBE anticorrosion coatings be used with extreme caution in compressor outlet pipelines.
压缩机出口易受高温和振动影响;当管道处于此类条件下时,管道上的防腐层可能会退化。熔结环氧(FBE)粉末涂料是压缩机出口管道上最常见的防腐涂层类型。研究压缩机出口管道防腐层的可靠性很有必要。本文提出了一种天然气站压缩机出口管道耐腐蚀涂层的服役可靠性测试方法。进行了使管道同时暴露于高温和振动的测试,以便在压缩时间尺度上评估FBE涂层的适用性和服役可靠性。分析了FBE涂层在高温和振动作用下的失效机制。研究发现,由于涂层初始缺陷的影响,FBE防腐涂层通常不符合压缩机出口管道的使用标准要求。在同时暴露于高温和振动后,发现涂层的抗冲击性、耐磨性和抗弯曲性均不符合其预期应用的要求。因此建议在压缩机出口管道中极其谨慎地使用FBE防腐涂层。