Gao Xinxin,Liu Yu,Liang Xiaoming*,et al.The influence of static and dynamic hydrogen charging on the corrosion and hydrogen embrittlement properties of 1 000 MPa high-strength steel[J].Plating & Finishing,2024,(12):56-60.
静、动态充氢对1 000 MPa级高强钢腐蚀及氢脆性能的影响
- Title:
- The influence of static and dynamic hydrogen charging on the corrosion and hydrogen embrittlement properties of 1 000 MPa high-strength steel
- 分类号:
- TG174
- 文献标志码:
- A
- 摘要:
- 采用恒电位充氢条件下的电化学实验，静、动态充氢后慢应变拉伸试验研究了1 000 MPa级高强钢在海水中的腐蚀及氢脆性能。结果表明：电化学充氢后材料的自腐蚀电位负移，腐蚀热力学倾向增大，析氢电位略有正移，析氢倾向增加。高强钢的静、动态充氢拉伸实验表明，充氢后，金属的断裂方式由韧性向解理和沿晶断裂方向转变，氢脆性能增强；静态充氢对材料导致的脆化和损伤程度要远高于动态，相对于静态充氢时间的加长，极化电位对材料氢脆性能的影响更明显。
- Abstract:
- The corrosion and hydrogen embrittlement properties of 1 000 MPa high-strength steel in seawater were studied through electrochemical experiments under constant potential hydrogen charging conditions and slow strain tensile tests after static and dynamic hydrogen charging. The results show that after electrochemical hydrogenation, the self-corrosion potential of the material shifts negatively, the corrosion thermodynamic tendency is increased. The hydrogen evolution potential slightly shifts positively, and the hydrogen evolution tendency is increased. The static and dynamic hydrogen charging tensile tests of high-strength steel show that after hydrogen charging, the fracture mode of the metal changes from toughness to cleavage and intergranular fracture direction, and the hydrogen embrittlement performance is enhanced. The degree of embrittlement and damage caused by static hydrogenation is much higher than that caused by dynamic hydrogenation. Compared to the prolongation of static hydrogenation time, the effect of polarization potential on the hydrogen embrittlement performance of materials is more significant
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