X90管线钢氢扩散行为研究

沈梦蝶; 严春妍; 田展鹏; 吴晨; 周凌川; 张盛林

doi:10.7512/j.issn.1001-2303.2025.05.11

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X90管线钢氢扩散行为研究
Research on Hydrogen Diffusion Behavior in X90 Pipeline Steel
2025年55卷第5期页码：82-88
收稿：2024-11-13，

修回：2025-02-27，

纸质出版：2025-05-20
DOI： 10.7512/j.issn.1001-2303.2025.05.11
稿件说明：

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沈梦蝶，严春妍，田展鹏，等.X90管线钢氢扩散行为研究［J］.电焊机，2025，55（5）：82-88. DOI： 10.7512/j.issn.1001-2303.2025.05.11.

SHEN Mengdie, YAN Chunyan, TIAN Zhanpeng, et al.Research on Hydrogen Diffusion Behavior in X90 Pipeline Steel[J].Electric Welding Machine, 2025, 55(5): 82-88. DOI： 10.7512/j.issn.1001-2303.2025.05.11.

摘要

X90管线钢是第三代高级别管线钢的典型钢种，在长距离油气输送管道服役过程中可能面临着严重的氢致开裂（hydrogen induced cracking，HIC）问题。采用双电解池氢渗透试验，探究了X90管线钢在不同溶液浓度、温度和充氢电流密度下的氢渗透行为。结果表明，随着充氢电流密度增加，X90管线钢氢渗透曲线中一次和二次循环到达稳态电流密度的时间减小。充氢电流密度从10 mA·cm

-2

增加到25 mA·cm

-2

，氢扩散系数

eff

从1.19×10

-7

·s

-1

增加到2.23×10

-7

·s

-1

；随着阴极侧酸性溶液浓度的增加，阴极侧氢浓度增加，氢扩散的动力增加导致氢渗透行为加强。阴极侧氢浓度

从1.61×10

-3

mol·L

-1

增加到2.43×10

-3

mol·L

-1

，氢扩散系数

eff

数值从1.39×10

-7

·s

-1

增加到2.23×10

-7

·s

-1

；随着充氢溶液温度增加，氢原子可以获得更大的动能，同时较高的温度下析氢反应更剧烈。当温度达到75 ℃时，氢扩散系数

eff

可达

3.69×10

-7

·s

-1

。高温时氢陷阱捕获氢的作用大大减弱，氢陷阱密度的数值显著减小。

Abstract

X90 pipeline steel is typical steel of the third generation of high-grade pipeline steel

which may face serious hydrogen induced cracking (HIC) problems during the service process of long-distance oil and gas transmission pipelines. The hydrogen permeation behavior of X90 pipeline steel under different solution concentrations

temperatures and hydrogen charging current densities was studied using the dual-cell hydrogen permeation test. The results showed that with the increase of hydrogen charging current density

the time taken by the primary and secondary cycles to reach the steady-state current density was shortened. When the hydrogen charging current density increased from 10 mA·cm

-2

to 25 mA·cm

-2

the hydrogen diffusion coefficient

eff

increased from 1.19×10

-7

·s

-1

to 2.23×10

-7

·s

-1

. With the concentration of acidic solution on the cathode side increasing

the hydrogen concentration on the cathode side increased

and the kinetic force of hydrogen diffusion increased

leading to the enhancement of hydrogen permeation behavior. The hydrogen concentration on the cathode side

increased from 1.61×10

-3

mol·L

-1

to 2.43×10

-3

mol·L

-1

and the hydrogen diffusion coefficient

eff

increased from 1.39×10

-7

·s

-1

to 2.23×10

-7

·s

-1

. As the temperature of the hydrogen-filled solution increased

the hydrogen atoms could gain greater kinetic energy. At the same time

the hydrogen evolution reaction was more intense at higher temperatures. When the temperature reached 75 ℃

the hydrogen diffusion coefficient

eff

could reached 3.69×10

-7

·s

-1

. At high temperatures

the effect of hydrogen traps on hydrogen capture was greatly weakened

and the density of hydrogen traps was significantly reduced.

关键词

Keywords

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