摘要
对于埋在地下的钢制输气管道,若不采取适当的防腐措施,或者防腐涂层出现破损,在运行一段时间后,短则几个月,长则几年,都会因为腐蚀穿孔而泄漏。天然气管道泄漏所带来的后果是无可估量的。散流于大地中的电流对管道所产生的腐蚀(称杂散电流腐蚀)是一种由外界因素引起的强度较高的电化学腐蚀,杂散电流时可导致地下金属设施严重腐蚀破坏,其所引起的腐蚀比一般的电化学腐蚀要强烈得多。本文通过COMSOL Multiphysics仿真软件,实现对油气管道杂散电流腐蚀动态的仿真,分析计算出杂散电流在埋地钢制管道防腐涂层破损处的分布规律和强度变化,为检测和防范杂散电流提供理论支撑。
If not taking anticorrosion measures properly, or coating {allure, gas pipeline made of steel underground would leak because of erosion after running for a period of time, which could be a few months or several years. The conse- quences caused by the leakage are immeasurable. A loose corrosion current in ground of the pipe, called the stray current corrosion, also known as interference corrosion is electrochemical corrosion caused by an external factor of high strength, stray current leads to the destruction of serious corrosion of underground metallic facilities. Corrosion caused by electro- chemical corrosion of it than the general must be much more intense. The paper realized the oil gas pipeline stray current corrosion dynamic simulation by COMSOL Multiphysics, calculated the damage distribution, the stray current in a steel pipeline anticorrosion coating of buried intensity change, detection, and provided theoretical support for prevention of stray current.
出处
《新技术新工艺》
2014年第1期22-24,共3页
New Technology & New Process
