电阻焊(ERW)焊管的生产效率高、使用效果好,但是在焊接过程中,快速的冷热循环造成基材和热影响区的微观组织不同,从而导致ERW钢管在服役环境中发生V形沟槽腐蚀。沟槽腐蚀敏感性受环境因素影响,如温度、溶氧量、pH值和活性离子等。在所有这些有害因素中,钢中的S含量对沟槽腐蚀敏 Resistance welding (ERW) welded pipe production efficiency, the use of good effect, but in the welding process, the rapid cooling and heating cycle caused by the microstructure of the substrate and the heat affected zone are different, resulting in ERW pipe V-shaped groove occurred in service environment Groove corrosion. Trench corrosion sensitivity is affected by environmental factors such as temperature, dissolved oxygen, pH and reactive ions. Among all these deleterious factors, the S content in the steel is sensitive to trench corrosion