奥氏体不锈钢制压力容器产品的制造监检

本文总结了奥氏体不锈钢制容器产品在制造过程时安全性能监督检验应注意的问题,以提高监检质量,确保产品质量。

奥氏体不锈钢制压力容器强度裕度的分析

奥氏体不锈钢制是一种新型压力容器,这种奥氏体不锈钢制新型压力容器具有较强的强度和裕度,在现代生产中的应用,使生产产品原料在生产中的投放空间更广阔,促进我国社会生产技术的进步,本文通过在不同状态下奥氏体不锈钢制压力容器在进行分析,促进我国社会生产技术的完善与发展。

再沸器疲劳失效分析

在奥氏体不锈钢制再沸器的上管板与壳程筒体焊接的管板一侧发生蒸气泄漏。采用化学成分分析、力学性能测定、宏、微观检验、有限元应力计算及振动测试等方法对再沸器的材料、加工工艺和工作状况进行了综合分析。结果表明,管板材料性能较差,在制造该再沸器过程中受焊接热循环和较高应力水平的影响,造成在热影响区形成微裂纹,进而又在工作介质和应力的作用下在该区域发生疲劳损伤而形成宏、微观裂纹致蒸气泄漏。提出了预防和改进措施。

Inhibition effect of 2-amino-5-ethyl-1,3,4-thiadiazole on corrosion behaviour of austenitic stainless steel type 304 in dilute HCl solution

The corrosion inhibition of type 304 austenitic stainless steel by 2-amino-5-ethyl-1, 3, 4-thiadiazole(TTD) compound and the electrochemical behaviour in dilute HCl solution were investigated through potentiodynamic polarization test, mass loss techniques and potential measurements. The results show that the organic derivative is highly effective with a maximum inhibition efficiency of 70.22% from mass loss analysis, while 74.2% is obtained from polarization tests. Observation of the scanning electron micrographs shows the absence of corrosion products due to electrochemical influence of TTD on the surface morphology of the steel. X-ray diffractometry reveals the absence of phase compounds and complexes on the steel samples after exposure. TTD adsorption on the steel surface obeys the Langmuir, Frumkin and Freundlich adsorption isotherms. Corrosion thermodynamic calculations reveal the inhibition mechanism occurs through chemisorption process and results from statistical analysis depict the strong influence of inhibitor concentration on the electrochemical performance of the TTD.