摘要
在石油和天然气田生产中,地下沉积结垢、孔蚀和焊缝腐蚀是引起局部腐蚀失效的主要原因。自从应用先进仪器仪表以及2002年局部腐蚀实验议定书的成功颁布,该技术广泛应用于研究抑制局部腐蚀。绿色缓蚀剂已经通过筛选而且在结垢型孔蚀条件下的缓蚀能力已被证实。这项工作的关键监测参数在抑制局部腐蚀中有待确定,这成就了一个完善的测试议定书。此外,对缓蚀剂减缓焊缝腐蚀的能力也进行了评估。缓蚀剂抑制焊缝腐蚀和地下沉积的能力也被证明.结果显示,专业实验室测试有权优于现场生产进行结果分析。
Under-deposit/scale, pitting and weld corrosion are a major cause of localised corrosion failure in oil and gas production systems.Since advancement in instrumentation and the successful development of the localised corrosion test protocol in 2002,the technique has been widely used to study the inhibition of localised corrosion.The latest examples of its application are presented.Green corrosion inhibitors have been screened and their ability to inhibit under scale pitting has been determined.The work has allowed the key monitoring parameters in the inhibition of localised corrosion to be identified,which has resulted in a refinement of the test protocol.Additionally,the ability of corrosion inhibitors in preventing weld corrosion was also assessed.The ability of the corrosion inhibitors to be effective against weld corrosion and under deposit corrosion was demonstrated.The results established that specialised laboratory tests should be used to qualify inhibitors prior to field deployment.
出处
《石油化工应用》
CAS
2009年第3期8-11,共4页
Petrochemical Industry Application
关键词
绿色缓蚀剂
地下沉积
焊缝腐蚀
局部腐蚀
green corrosion inhibitors
under-deposit
weld corrosion
localised corrosion