20号钢管在高氧/高硫环境中的腐蚀机理

Corrosion Mechanism of 20# Steel Pipe in High Oxygen/High Sulfur Environment

摘要: 20号钢管凭借运输成本低、效率高、建设周期较短等优点，被应用于化工冶金、电力、石油、医学药物及公共工程等各大领域。然而，20号钢管在服役期间会出现腐蚀问题，尤其是在高氧、高硫环境中。因此，本文重点分析了20号钢管在高氧、高硫环境中的腐蚀机理，即20号钢管与氧、硫发生化学反应，构成腐蚀电池，加剧20号钢管的腐蚀。此外，从钢管材质、添加缓蚀剂及涂层防腐三方面出发，提出了如何提高20号钢管耐腐蚀性能。为有效降低20号钢管因腐蚀失效而带来的经济损失、环境污染及人身危险等提供参考，促进20号钢管在各大领域中的广泛应用。

Abstract: With the advantages of low transportation cost, high efficiency and short construction cycle, 20# steel pipe is applied to chemical metallurgy, electric power, petroleum, medical drugs, public works and other fields. However, 20# steel pipe will face corrosion problems during service, especially in high oxygen and high sulfur environment. Therefore, this paper focuses on the corrosion failure mechanism of 20# steel pipe in high oxygen and high sulfur environment, that is, 20# steel pipe reacts with oxygen and sulfur to form a corrosion battery, which intensifies the corrosion of 20# steel pipe. In addition, how to improve the corrosion resistance of 20# steel pipe is put forward from three aspects: steel pipe material, adding corrosion inhibitor and coating anti-corrosion. To effectively reduce the economic loss, environmental pollution and personal danger caused by corrosion failure of 20# steel pipe, and promote the wide application of 20# steel pipe in various fields.