论文部分内容阅读
管道输送是油气运输中最便捷、经济和可靠的方式,它是随着石油工业的发展而产生的,而腐蚀是影响管道系统可靠性及使用寿命的关键因素,因此,研究管线钢的抗腐蚀性能至关重要。本文通过二次热处理技术、硬度测试及显微组织分析等方法,对X80钢在不同PH值H2S溶液中的腐蚀情况作了系统的研究。对不同PH值溶液相同时间、同一PH值不同时间腐蚀后的X80管线钢做了分析比较;并且通过观察热处理过程、PH值、时间对材料腐蚀程度的影响,对X80管线钢的腐蚀情况有了进一步的了解。通过实验结果及理论分析可以得出热处理工艺对X80管线钢的腐蚀性能没有显著影响。经过不同热处理加工的试样在同样的腐蚀条件下,最终的腐蚀程度差别不明显;腐蚀对X80钢的硬度值无显著影响。试样在不同PH值溶液中经过不同时间的腐蚀,最终硬度值的变化很小;PH值低的溶液腐蚀程度大于PH值高的溶液,腐蚀程度随着腐蚀时间的增加逐渐缓慢。
Pipeline transportation is the most convenient, economical and reliable way to transport oil and gas. It is along with the development of petroleum industry. Corrosion is the key factor that affects the reliability and service life of pipeline system. Therefore, Performance is crucial. In this paper, the corrosion of X80 steel in H2S solution with different pH value was systematically studied by means of secondary heat treatment, hardness test and microstructure analysis. The corrosion of X80 pipeline steel was analyzed and compared with the same PH value and the corrosion of X80 pipeline steel at the same time and the same PH value. By observing the influence of heat treatment process, PH value and time on the corrosion of X80 pipeline steel, Better understanding of. Through the experimental results and theoretical analysis, it can be concluded that the heat treatment process has no significant effect on the corrosion performance of X80 pipeline steel. After the different heat treatment of the sample in the same corrosion conditions, the final degree of corrosion is not obvious difference; corrosion on the hardness of X80 steel no significant effect. The samples were etched at different pH for different time and the final hardness value changed very little. The solutions with lower pH value were more corrosive than the solutions with high PH value, and the corrosion degree gradually became slower with the increase of corrosion time.