G105钻具材料的渗氢行为研究

Research on Hydrogen Permeation of G105 Drilling Steel

采用电化学渗氢和硫化物应力腐蚀开裂实验方法,研究了G105钢的钻杆、方钻杆、转换接头的渗氢性能,以及在应力渗氢环境下的断裂行为。结果表明,不同构件G105材料的渗氢电流和氢的渗透通量有明显区别。随充氢电流增大,试样的渗氢电流和氢的渗透通量增大。在不同应力条件下,3种部件的渗氢实验表明,其断裂时间随应力的增大而缩短。

Adopting electrochemical hydrogen permeation and stress corrosion cracking test method, the corrosion crack behavior of G105 steel was investigated, which includes hydrogen permeation performance and the impact of stress. The results show that, there is obvious difference between the permeation flux of hydrogen and hydrogen permeation current in different parts of the material. With the increase of hydrogen charging current, seepage current and flux of hydrogen of the samples both increase. Under different stress conditions, hydrogen permeation experiments show that the fracture time of G105 steel decreases with increasing stress.