研究了国产钢经不同温度和时间氢暴露后的力学性能、疲劳性能和断裂韧性，用扫描电镜证实了氢蚀后断裂机制发生了变化。研究表明：随氢蚀程度增加，20G钢抗拉强度和塑性降低明显，CrM0钢抗拉强度略有降低，塑性变化不大。氢蚀使20G钢的门槛值有一个最小值，而断裂韧性随氢蚀程度升高而降低，在氢蚀程度较低时，断裂韧性下降程度大；在氢蚀程度较高时，断裂韧性下降程度变缓．碳钢的疲劳性能变化是由于材料损伤作用和氢蚀造成的裂纹表面引起的闭合效应增加二者共同作用的结果。

利用高温显微镜,对碳钢氢腐蚀裂纹的愈合过程进行原位、实时观察，通过录象记录了整个裂纹愈合实验过程。结果表明，裂纹在加热到630℃左右时，发生明显愈合而变小变细。实验中造成的CH4气体散失和内部裂纹表面化使得实验结果与真实情况有一定的偏差，观察得到裂纹闭合的临界温度630℃低于实际裂纹闭合温度。发生氢蚀裂纹愈合的机制是热扩散。动力是氢蚀气泡长大导致的塑性变形能Es。在Fe、C和H原子扩散足够快的情况下。氢蚀裂纹愈合的条件是Es大于2γ/r（γ为界面表面张力，r为气泡半径或裂纹半长）。

对氢蚀前后低碳钢拉伸过程中的声发射（AE）行为进行了研究。结果表明，氢蚀使低碳钢拉伸过程事件数明显减少，但是高幅声发射信号的振铃计数明显增多。声发射源以显微裂纹长大与连接为主。

The effects of SO2 on the initial atmospheric corrosion of AZ91D magnesium alloy were investigated in laboratory. Metallographic observation, SEM (Scanning Electron Microscopy), XRD (X-ray Diffraction) and XPS (X-ray Proton Spectrograph) were used to analyze and discuss the initial surface morphology of corrosion layers and corrosion products. The corrosion rate of the alloy increases with increasing the content of SO2. The initial attack has the characteristics of localized corrosion and preferentially concentrates on a phase. MgO and Mg(OH)2 form at first, which provide a protective layer, then the existence of SO2 decreases the pH of the thin solution on the alloy, accelerates dissolution process, and promotes the formation of MgSO3.6H20 and MgSO4.6H20, meanwhile cracks were found on the corrosion products with corrosion continuation. These soluble corrosion products and the cracks provide the paths for filtering oxygen and corrosion pollutants into the matrix, which results in severe localized corrosion and the loss of protective function of film.

采用扫描电镜、X射线衍射方法对Mg合金AZ9lD在城市大气中的腐蚀层形貌，腐蚀产物进行了分析和研究。结果表明：腐蚀初期在材料表面生成一层Mg（OH）2薄膜，随着腐蚀的不断进行，膜增厚并开裂，最终形成网状结构。在裂纹处水蒸气容易凝聚，腐蚀性气体及盐粒容易吸附，且裂纹或缝隙为氧的扩散提供了通道，造成Mg合金局部腐蚀严重。生成的腐蚀产物主要为Mg（oH）2，A1（oH）3，Mg2CO3（oH）2·3H2O和Mg2（oH）3Cl·4H20，这些微溶的腐蚀产物对基体起到了一定的保护作用，从而在后期降低了Mg合金的腐蚀速率。