Addition of trace lanthanum salt in acid solution was found to be enhanced inhibitory effect on hydrogen permeation to X70 pipeline steel. The hydrogen permeation curves were performed to show that the addition of La³⁺ inhibits hydrogen permeation by accelerating the recombination of the adsorbed hydrogen atoms and the desorption of hydrogen molecule, which decrease the subsurface hydrogen concentration. The inhibitory effect of La³⁺ involves the film formation process. Moreover, electrochemical impedance spectroscopy analysis (EIS) depict that the inhibitive effect is caused by the catalysis of the recombination-desorption-evolution of adsorbed hydrogen atoms by La(OH)₃/La₂O₃. This provides a novel solution for the prevention of hydrogen-induced cracking of high-strength steel, which often causes catastrophic accidents.

在酸性溶液中添加微量镧盐可以增强对X70管线钢氢渗透的抑制作用。氢渗透曲线表明，La ³⁺的添加通过加速吸附氢原子的复合和氢分子的解吸，从而降低了地下氢浓度，从而抑制了氢渗透。^{La 3+}的抑制作用涉及成膜过程。此外，电化学阻抗谱分析（EIS）表明抑制作用是由La(OH) ₃ /La ₂ O _{3催化吸附的氢原子的复合-解吸-演化引起的。}. 这为防止经常引起灾难性事故的高强度钢的氢致开裂提供了一种新的解决方案。