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酸气分离器内部腐蚀产物及涂层脱落的分析

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  • 1中国石油化工股份有限公司西北油田分公司中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室; 2重庆科技学院冶金与材料工程学院

网络出版日期: 2025-07-10

Analysis on Corrosion Products and Coating Shedding in Acid Gas Separator

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  • 1. SINOPEC Northwest Company of China Petroleum and Chemical Corporation, Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured-Vuggy Reservoirs, CNPC, Urumqi 830011, China;2. School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China

Online published: 2025-07-10

摘要

为了评估和分析西北某油气田的酸气分离器经常出现的内部腐蚀问题,对酸气分离器内部及所用涂层进行了宏观及微观形貌观察、常规检测、腐蚀产物元素及成分分析,结果表明:酸气分离器出现了明显的腐蚀,底部堆积的污垢厚度可达约10 mm,局部腐蚀坑深度可达0.5~1.0 cm;所用涂层总体保持完好,但局部区域出现了明显变色脆化及严重脱落,尤其是水线以下的破坏较为严重。分析认为,服役环境中硫化氢等酸性腐蚀性介质的存在、涂层施工工艺质量控制以及所选涂料对现场环境的适应性可能是导致酸气分离器腐蚀的根本原因,并提出了相应的改进建议。

本文引用格式

刘强, 任权友, 马骏, 高秋英, 邵勇华, 孙海礁, 曹献龙, 曾文, 兰伟 . 酸气分离器内部腐蚀产物及涂层脱落的分析[J]. 材料保护, 2021 , 54(8) : 177 . DOI: 10.16577/j.cnki.42-1215/tb.2021.08.031

Abstract

In order to evaluate and analyze the internal corrosion of acid gas separator in an oil and gas field in Northwest China, the corrosion of the substrate and internal coating of an acid gas separator was investigated by using macroscopic and morphology observation, routine inspection, corrosion product element and composition analysis. Results showed that the obvious corrosion occurred in the investigated acid gas separator, and the dirt thickness of about 10 mm was accumulated on the bottom of the separator and the local corrosion pit could reached 0.5~1.0 cm. In addition, the internal coating was generally kept in good condition, but there were obvious discoloration, embrittlement and serious peeling-off in some areas. Especially, the damage under the water line of the separator was relatively serious. It was considered that the existence of acid corrosive media such as hydrogen sulfide in the service environment, the quality control of coating application process and the adaptability of the selected coating to the service environment might be the basic reasons for the corrosion of the acid gas separator. Finally, several suggestions were given for the corrosion prevention.
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