总结金属间化合物两类室温环境氢脆的研究成果.金属间化合物的环境氢脆涉及两个主要过程，即氢原子的产生和氢原子在合金中的扩散.实验结果证实,在空气中氢原子的产生途径是合金中的活性元素与水汽发生表面反应，而在氢气中则是合金表面的过渡族元素催化裂解氢气分子成为氢原子.抑制金属间化合物发生环境氢脆的有效途径是合金化.硼可以完全抑制Ni₃Al合金中由水汽诱发的环境氢脆，其主要机理是硼原子强烈降低了氢原子的沿晶扩散系数.铁可以有效抑制Co₃Ti合金中由水汽诱发的环境氢脆，其机理是铁原子抑制了合金与水汽的表面反应.硼可以完全抑制有序态Ni₃Fe合金中由氢气诱发的环境氢脆，其机理是硼原子偏聚在晶界上，降低了合金的晶粒尺寸，提高了合金的晶界强度,显著降低了氢原子的沿晶扩散系数.

The research of two kinds of environmental hydrogen embrittlements in intermetallic at room temperature is summarized in this paper. Environmental embrittlement of intermetallic involves two main processes: generation of atomic hydrogen and diffusion of hydrogen in the alloy. The experimental results have verified that the ways of hydrogen atom generation are surface reaction of active elements with water vapor in air and catalysis reaction of molecular H₂ induced by transition metal atoms in gaseous hydrogen. The efficient method of suppressing environmental embrittlement of intermetallic is alloying. The moistureinduced environmental embrittlement can be suppressed completely by borondoping in Ni3Al alloy. The basic mechanism of the suppression effect of boron is related to severe reduction of hydrogen diffusivity along the grain boundaries. Effective suppression of the moistureinduced environmental embrittlement by Fedoping in Co₃Ti alloy is related to the reduction of the surface reaction kinetic of Co₃Ti alloy with water vapor. The H₂induced embrittlement can be suppressed completely by boron addition in the ordered Ni₃Fe alloy. The suppression mechanism is that boron atom segregates to the grain boundary, reducing the grain size and increasing the mechanical properties of the alloy. Boron in the ordered Ni₃Fe alloy clearly increases cohesion of grain boundary and decreases the diffusion coefficient of hydrogen along grain boundary.