Northern hydrogen stripping test
Tianjin Rong Da Testing Co., Ltd. contact: Wang Jingfu
Cell phone: 13102238283 QQ:3144667033
Telephone: 022-23892103
After a certain period of time, the hot wall hydrogenation reactor is used to detect the phenomenon of the separation of the main part of the surfacing layer, which is called the hydrogen stripping of the surfacing layer.
The reason for hydrogen stripping is that the current consensus is that:
1 reactor body material and surfacing layer has different hydrogen solubility and diffusion rate, which leads to the high hydrogen concentration in the surfacing layer;
2 because of the difference of the thermal expansion coefficient between the substrate and the surfacing layer, the large residual stress is generated at the interface;
3 metallurgical factors at the interface of the surfacing layer. The reactor at the interface between substrate and cladding layer peeling phenomenon, is also a kind of essence of hydrogen embrittlement.
Hydrogen stripping test
Influence factors of anti stripping performance is various, many large hairdressing machine testing is still in exploration.
Hydrogen stripping test scheme and standard
Standard Practice for evaluation of G146-2001 ASTM (2013) duplex stainless steel / steel plate for high pressure and high temperature hydrogen refining equipment
Countermeasures to prevent the hydrogen induced disbonding of surfacing layer: 1, reduce the hydrogen concentration on the interface; 2, reduce the residual stress; 3, try to make the fusion line near the surfacing layer tissue with low hydrogen embrittlement; 4, strictly abide by the rules, to avoid unplanned emergency parking; 5, in the normal shutdown should be taken to make hydrogen shutdown conditions as much as possible is released from the wall in the