采用Minitab软件优化硫化氢腐蚀试验条件的参数

利用Minitab软件提供的试验设计(DOE),响应优化器等功能,对硫化氢腐蚀实验进行最佳试验条件筛选。结果表明,最佳实验条件温度50℃,硫化氢浓度60 mg/L,时间24 h。在最佳条件下进行实验,可以稳定实验过程、缩短实验周期,提高了空白腐蚀率。

硫化氢应力腐蚀开裂A法试验影响因素探讨

硫化氢应力腐蚀开裂A法试验广泛用于抗硫油套管的产品检验,影响检验结果的除了材料自身性能之外,还有众多因素可能会对检验结果产生影响,如试样加工、试验设备、试验条件、试验后评价等。分析这些影响因素,探讨相关影响因素的解决或控制方法。

硫化物应力腐蚀试验中硫化氢通气装置的改进

在满足硫化氢应力腐蚀试验要求的条件下，采用自动止通夹，改进了硫化氢应力腐蚀实验室中Ｈ２Ｓ气体的通气装置．该装置由化学反应发生Ｈ２Ｓ，可同时对多个试验容器通气；而且实现了出口 Ｈ２Ｓ气体的吸收再利用，减少了对环境的污染．

H_2S Stress Corrosion Tests of Welded Joint for X65 Pipeline Steel and Finite Element Numerical Analysis of Crack Tip

The microstructure of welded joint is surveyed and the mechanical properties of X65 pipeline steel are studied in this paper, which provides experimental basis of performance effect on stress corrosion. H 2S stress corrosion cracking (SCC) tests on the steel are carried out in the environment based on NACE TM- 01-77 solution. The threshold stress intensity factor and crack propagation velocity for base metal and HAZ are obtained. The susceptibility of welded joint for X65 pipeline steel to H 2S stress corrosion cracking is investigated. The programming package ANSYS of finite element model (FEM) is used to perform the three-dimensional elastic-plastic finite element analysis of WOL specimens. Stress field and concentration of hydrogen distribution property of the crack tip are obtained.