【作者】 颜志斌；

【导师】 刘烈炜；

【作者基本信息】 华中科技大学 ， 物理化学， 2009， 硕士

【摘要】 西南气田是我国开采最早、开采量最大的气田之一,其中含硫气藏占到24%,川东气田更是高含硫气田,其H₂S含量最高达到18%且产出气中不含具有缓蚀效果的凝析油,腐蚀条件十分恶劣。国内目前开采高含硫气田的经验还不丰富,没有形成专门针对此条件下的防腐工艺。近年来油气田开采量随着国家石油化工产业的发展而不断增大,如何保证安全有效的生产成为了重要课题。本文针对高含H₂S/CO₂以及高矿化度的恶劣腐蚀条件,研制出了YS、BD和KL三个系列的缓蚀剂。通过模拟腐蚀环境条件对三种缓蚀剂分别进行了常压失重法,高压条件失重法评价其缓蚀效果,并与PG系列商用缓蚀剂进行了对比实验。此外还通过极化曲线法、电化学阻抗谱法以及旋转圆柱电极等方法研究了缓蚀剂的缓蚀机理。主要研究结果如下:本文研制的KL系列缓蚀剂可以作为高含硫高矿化度条件下的有效缓蚀剂。KL系列缓蚀剂是阳极抑制为主的混合控制吸附膜型缓蚀剂,作用机理为负催化机理。本文还提出了旋转圆柱电极监测自腐蚀电位的法可以作为初步筛选吸附膜缓蚀剂的新方法。更多还原

【Abstract】 Southwest Gas is the first and the largest gas field in china, which accounted for sulfur content of 24% gas reservoir. For instance, Eastern Sichuan gas field is a high sulfur gas-field, the H₂S content of up to 18% and there is no condensate oil in the output gas. The gas-field pipelines are in poor corrosion conditions. At present, we do not have much mining experience of domestic high-sulfur gas field, and there is no specifically technics for this condition. In recent years, as the petrochemical industry developed rapidly, exploitation of oil and gas fields increased, how to ensure the production of safe and effective has become an important issue.In this paper, we developed YS, BD and KL three series of H₂S/CO₂ hyperconcentrated Corrosion Inhibitors. By using weight-lose method of atmospheric pressure and high pressure conditions, these three series of corrosion inhibitor were evaluated both in corrosion rate and surface behavior. And we also compared these three kinds of corrosion inhibitor with a commercial corrosion inhibitor PG series, which has already been used in PuGuang gas-field. In addition, we researched the mechanism of corrosion inhibition by study the polarization curves, electrochemical impedance spectrum and rotating cylinder electrode behavior. the methods and conclusions of this thesis respectively as follows:1. KL Series inhibitors are effective inhibitor according to the high H₂S/CO₂ condition;2.KL Series inhibit are Anode-based hybrid inhibit, Adsorption of membrane-type corrosion inhibitor, the mechanism of which is negative catalytic mechanism.3.This paper also proposed that monitor the corrosion potential of the rotating cylinder electrode could be used as a new method of initial screening of corrosion inhibitors.更多还原