美国石油学会（API）X52碳钢管道冲蚀-腐蚀失效研究

Investigation of erosion-corrosion failure of API X52 carbon steel pipeline.

作者信息

Abdu Mahmoud T, Khalifa Waleed, Abdelrahman Maiada S

机构信息

Department of Metallurgical Engineering, Faculty of Engineering, Cairo University, Giza, 12613, Egypt.

出版信息

Sci Rep. 2023 Nov 22;13(1):20494. doi: 10.1038/s41598-023-42556-6.

DOI:10.1038/s41598-023-42556-6

PMID:37993506

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10665430/

Abstract

A failure analysis of API X52 steel pipeline was conducted. The investigation included complete material characterizations using tensile and hardness testing, optical microscope, SEM, and EDS. The main failure occurred in the downstream pipe located near the welded joint at the elbow outlet instead of elbow which was interesting. The main mechanism of failure was found to be erosion-corrosion mechanism that caused breakdown of the protective FeCO film, thinning of the downstream pipe, and finally failure. It is believed that the erosion-corrosion was induced by sand impingement due to turbulent flow that was promoted by sudden change in the flow cross section between the elbow inlet and upstream pipe and poor welding quality of joint at the elbow outlet.

摘要

对API X52钢管道进行了失效分析。调查包括使用拉伸和硬度测试、光学显微镜、扫描电子显微镜和能谱仪进行全面的材料表征。主要失效发生在靠近弯头出口焊接接头处的下游管道，而非弯头处，这一点很有意思。发现主要失效机制是冲蚀腐蚀机制，该机制导致保护性FeCO膜破裂、下游管道变薄，最终失效。据信，冲蚀腐蚀是由弯头入口和上游管道之间流动横截面突然变化以及弯头出口处接头焊接质量差所促进的湍流导致的砂粒冲击引起的。