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。

选用Cr-Mo钢经400℃，20MPa，104h氢暴露后进行拉伸、断裂韧性和疲劳试验。结果表明：Cr-Mo钢已经发生了氢腐蚀，氢蚀使Cr-Mo钢强度、塑性和断裂韧性均有所降低，也使断裂机制由韧窝型转变为解理脆性。氢蚀使疲劳裂纹扩展行为也发生了变化，疲劳裂纹扩展速率增加，△Kth降低。Cr-Mo钢氢蚀后，随应力比增加，疲劳裂纹扩展门槛值大幅度降低。

借助扫描电镜（SEM/EDX）、X射线衍射（XRD）研究了NaCl单个因素对镁合金AZ9lD初期腐蚀行为的影响，并对SO2和NaCl的协同作用进行了探讨。Nacl存在时初期破坏金属表面的保护膜，但后期微溶性腐蚀产物的生成导致腐蚀速率的降低。当NaCl和SO2同时存在时，反应生成的可溶性产物不具有阻碍的作用，同时他们会发生部分溶解生成自由移动的离子，大量难溶物在镁合金表面难以短时间形成，故Nacl和SO2同时存在引起的腐蚀远大于两者单独存在时引起的腐蚀加和。NaCl和SO2对镁合金的初期大气腐蚀具有明显的协同作用。

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。

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.