한국재료학회지 제27권 제3호 (p.172-178)

Cu-Zn 황동에서 수소가 탈아연 부식에 미치는 영향

Effect of Hydrogen on Dezincification of Cu-Zn Brass
키워드 :
Cu-Zn alloy,hydrogen,dezincification,stress corrosion crack.

초록

The aim of this study is to consider the effect hydrogen on dezincification behavior of Cu-Zn alloys. The investigations include microstructural observations with scanning electron microscope and chemical composition analysis with energy dispersive spectrometer. The dezincification layer was found to occur in high pressure hydrogen atmosphere, not in air atmosphere. In addition, the layers penetrated into the inner side along the grain boundaries in the case of hydrogen condition. The shape of the dezincification layers was porous because of Zn dissolution from the α or β phase. In the case of stress corrosion cracks formed in the Cu-Zn microstructure, the dezincification phenomenon with porous voids was also accompanied by grain boundary cracking.